Commercial-grade light grey classroom chair with a one-piece molded seat and anti-tilt leg architecture, ideal for modern secondary school environments.
Neutral grey student seating featuring a tamper-resistant fixings design and a sleek profile, fully tested for heavy-use educational stability.
Size chart showing school chair dimensions by age group, including height, seat depth, and weight for children aged 3 to 14+ years. Ideal for selecting age-appropriate classroom seating.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 4 Light Grey Anti-Tilt Senior Primary Seating

The Cobolt Light Grey Size 4 Chair is the ideal seating transition for students aged 8 to 11 years. Dispatched with Free UK Mainland Delivery, it is built to endure the high-frequency cleaning and heavy daily use required in busy Year 5 and Year 6 classrooms.

The Cobolt Advantage

  • Budget Continuity: Our 15-year structural warranty provides unparalleled financial protection, ensuring your school's capital expenditure remains a one-time investment for over a decade.
  • Surface Resilience: The slate-grey powder-coated steel frame is scratch-resistant, ensuring the furniture retains its professional appearance despite the rigours of daily classroom life.
  • Orderly Environment: The anti-tilt geometry acts as a mechanical safeguard, shifting the balance point to discourage students from tipping over while seated, leading to a safer classroom.

KS2 Alignment & Responsibility

  • Upper Primary Posture: Fully compliant with Size 4 EN1729 standards, the 380mm seat height is precision-engineered to support the stature of 8-11 year olds during critical growth phases.
  • End-of-Life Responsibility: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through its circular economy design.
  • Vandal-Resistant Build: High-security fasteners ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the units in busy environments.

The Cobolt Standard

  • Five Decades of Heritage: We have half a century of experience as a trusted partner to the UK public sector, delivering furniture that exceeds standard compliance benchmarks.
  • Inclusive Logistics: We include UK Mainland shipping as standard, providing clear and transparent costings for your primary school refit project.
  • Domestic Quality Control: UK manufacturing guarantees high-grade finishes, faster lead times, and a significantly lower environmental impact than imported alternatives.

Where is this Light Grey Size 4 Chair used?

The Light Grey Size 4 School Chair is the standard specification for Year 5 and Year 6 Classrooms, Primary IT Suites, Junior Libraries, and After-School Study Zones. Its robust weight capacity combined with senior-primary dimensions makes it a versatile asset for a range of educational and community settings.

Key Features

  • Anti-Tilt Safety Frame – Angled rear legs proactively inhibit students from rocking backwards on two legs.
  • Size 4 (8-11 Years) – Ergonomically sized 380mm seat height for the upper primary age group.
  • 15-Year Structural Guarantee – Industry-leading warranty covering the frame welds and plastic shell integrity.
  • 3.5kg Unit Weight – Exceptionally strong construction that remains manageable for cleaning staff to move and stack.
  • Slate-Grey Steel Frame – High-grade metallic finish that resists scratches and vandal-related wear.
  • Stackable Design – Maximises floor space for physical activities and facilitates efficient evening cleaning routines.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and daily classroom abuse.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Primary Estates

  • Sector Expertise: With fifty years of heritage, we understand the specific durability and hygiene needs of UK primary education.
  • Direct Logistics: We manage the delivery of classroom refits free of charge to the UK mainland, keeping your project within budget.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's green procurement targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific student demographics.

Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for senior primary students, shifting the balance point to proactively prevent dangerous "chair swinging" habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (380mm) and width (370mm) are perfectly scaled for the 8-11 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or tabletop activities.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the slate-grey steel frame.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term reliability.

The Size 4 Light Grey Anti-Tilt Chair combines certified senior-primary ergonomics with an adult-strength safety frame. These specifications detail the materials used to create this durable classroom asset.

Target Ages
8-11 Years (Size 4)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
380mm
Standard Size 4 for Year 5 & 6
Seat Width
370mm
Precision sized for upper primary
Seat Depth
300mm
Full thigh support for KS2 students
Total Dimensions
700mm(H) x 410mm(W) x 480mm(D)
Stable classroom footprint
Unit Weight
3.5kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Scratch and vandal resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Environmentally ethical lifecycle

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

FAQs: Sourcing Seating for Senior Primary Students

Q: Is "Size 4" correct for Year 5 and Year 6 classrooms?

A: Size 4 (380mm seat height) is the ergonomic standard for children aged 8 to 11 years. It ensures that senior primary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during Key Stage 2.

Q: How does the "Anti-Tilt" frame improve classroom management?

A: Older primary students are often more active and prone to rocking on their chairs. The angled rear frame shifts the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively prevents accidents and focus disruptions.

Q: Is Light Grey a practical choice for a busy school?

A: Yes. Light Grey provides a sophisticated, modern aesthetic that reduces visual overstimulation. The polypropylene shell is completely non-porous and resistant to ink and chemicals, allowing for instant sanitisation with standard anti-bacterial cleaners.

Q: What is the maximum weight capacity for these chairs?

A: Despite being dimensioned for junior students, the high-strength slate-grey steel frame is rated for a massive 125kg. This ensures it is robust enough for occasional teacher use and evening community hires without the risk of buckling.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamper-proof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: Does this chair comply with BS EN1729?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for school furniture regarding ergonomics, strength, and structural durability.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 3.5kg build makes them easy to move.

Q: What does the 15-year warranty cover?

A: Our 15-year guarantee covers any structural failure of the welded steel frame and any manufacturing defects in the polypropylene shell. It provides your primary school with a definitive long-term seating solution.

Q: Why purchase from Cobolt Furniture?

A: We are a UK-based manufacturer with over 50 years of experience supplying schools. We provide Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK junior curriculum.

Overview

Product Overview: Size 4 Light Grey Anti-Tilt Senior Primary Seating

The Cobolt Light Grey Size 4 Chair is the ideal seating transition for students aged 8 to 11 years. Dispatched with Free UK Mainland Delivery, it is built to endure the high-frequency cleaning and heavy daily use required in busy Year 5 and Year 6 classrooms.

The Cobolt Advantage

  • Budget Continuity: Our 15-year structural warranty provides unparalleled financial protection, ensuring your school's capital expenditure remains a one-time investment for over a decade.
  • Surface Resilience: The slate-grey powder-coated steel frame is scratch-resistant, ensuring the furniture retains its professional appearance despite the rigours of daily classroom life.
  • Orderly Environment: The anti-tilt geometry acts as a mechanical safeguard, shifting the balance point to discourage students from tipping over while seated, leading to a safer classroom.

KS2 Alignment & Responsibility

  • Upper Primary Posture: Fully compliant with Size 4 EN1729 standards, the 380mm seat height is precision-engineered to support the stature of 8-11 year olds during critical growth phases.
  • End-of-Life Responsibility: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through its circular economy design.
  • Vandal-Resistant Build: High-security fasteners ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the units in busy environments.

The Cobolt Standard

  • Five Decades of Heritage: We have half a century of experience as a trusted partner to the UK public sector, delivering furniture that exceeds standard compliance benchmarks.
  • Inclusive Logistics: We include UK Mainland shipping as standard, providing clear and transparent costings for your primary school refit project.
  • Domestic Quality Control: UK manufacturing guarantees high-grade finishes, faster lead times, and a significantly lower environmental impact than imported alternatives.

Features & Benefits

Where is this Light Grey Size 4 Chair used?

The Light Grey Size 4 School Chair is the standard specification for Year 5 and Year 6 Classrooms, Primary IT Suites, Junior Libraries, and After-School Study Zones. Its robust weight capacity combined with senior-primary dimensions makes it a versatile asset for a range of educational and community settings.

Key Features

  • Anti-Tilt Safety Frame – Angled rear legs proactively inhibit students from rocking backwards on two legs.
  • Size 4 (8-11 Years) – Ergonomically sized 380mm seat height for the upper primary age group.
  • 15-Year Structural Guarantee – Industry-leading warranty covering the frame welds and plastic shell integrity.
  • 3.5kg Unit Weight – Exceptionally strong construction that remains manageable for cleaning staff to move and stack.
  • Slate-Grey Steel Frame – High-grade metallic finish that resists scratches and vandal-related wear.
  • Stackable Design – Maximises floor space for physical activities and facilitates efficient evening cleaning routines.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and daily classroom abuse.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Primary Estates

  • Sector Expertise: With fifty years of heritage, we understand the specific durability and hygiene needs of UK primary education.
  • Direct Logistics: We manage the delivery of classroom refits free of charge to the UK mainland, keeping your project within budget.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's green procurement targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific student demographics.

Safety & Warranty

Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for senior primary students, shifting the balance point to proactively prevent dangerous "chair swinging" habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (380mm) and width (370mm) are perfectly scaled for the 8-11 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or tabletop activities.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the slate-grey steel frame.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term reliability.

Specification Dimensions

The Size 4 Light Grey Anti-Tilt Chair combines certified senior-primary ergonomics with an adult-strength safety frame. These specifications detail the materials used to create this durable classroom asset.

Target Ages
8-11 Years (Size 4)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
380mm
Standard Size 4 for Year 5 & 6
Seat Width
370mm
Precision sized for upper primary
Seat Depth
300mm
Full thigh support for KS2 students
Total Dimensions
700mm(H) x 410mm(W) x 480mm(D)
Stable classroom footprint
Unit Weight
3.5kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Scratch and vandal resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Environmentally ethical lifecycle

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

FAQs: Sourcing Seating for Senior Primary Students

Q: Is "Size 4" correct for Year 5 and Year 6 classrooms?

A: Size 4 (380mm seat height) is the ergonomic standard for children aged 8 to 11 years. It ensures that senior primary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during Key Stage 2.

Q: How does the "Anti-Tilt" frame improve classroom management?

A: Older primary students are often more active and prone to rocking on their chairs. The angled rear frame shifts the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively prevents accidents and focus disruptions.

Q: Is Light Grey a practical choice for a busy school?

A: Yes. Light Grey provides a sophisticated, modern aesthetic that reduces visual overstimulation. The polypropylene shell is completely non-porous and resistant to ink and chemicals, allowing for instant sanitisation with standard anti-bacterial cleaners.

Q: What is the maximum weight capacity for these chairs?

A: Despite being dimensioned for junior students, the high-strength slate-grey steel frame is rated for a massive 125kg. This ensures it is robust enough for occasional teacher use and evening community hires without the risk of buckling.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamper-proof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: Does this chair comply with BS EN1729?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for school furniture regarding ergonomics, strength, and structural durability.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 3.5kg build makes them easy to move.

Q: What does the 15-year warranty cover?

A: Our 15-year guarantee covers any structural failure of the welded steel frame and any manufacturing defects in the polypropylene shell. It provides your primary school with a definitive long-term seating solution.

Q: Why purchase from Cobolt Furniture?

A: We are a UK-based manufacturer with over 50 years of experience supplying schools. We provide Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK junior curriculum.

Light Grey Classic Polypropylene Anti-Tilt School Chair - Grey Legs - Size 4

Product code: CH44GY
Refresh your upper primary and Key Stage 2 learning environments with the Cobolt Light Grey Classic Polypropylene School Chair (Size 4 / 8-11 Years). ...

Inc VAT

Exc VAT

£54.00

£45.00

Colours - Light Grey
Age - 8-11 Years

Request a Quote

You can add multiple configured items and submit once.

How it works
  1. Select all required options — Choose your size, finish, edge colour, frame colour, and any add-ons.
  2. Add to your Quote Basket — Click "Request Quote" to save this exact configuration.
  3. Keep adding items — Add as many products, sizes, or colour options as you need. Each item is saved separately in your Quote Basket.
  4. Submit once — Submit the Quote Basket one time — we'll receive everything together.
In Stock - UK Dispatch

Fast Tracked Dispatch Predictable. Reliable. Hassle-free.

UK Customer Support Expert guidance. Real people.

Trusted UK Supplier 50 years. Established. Reliable.

Free UK Mainland Delivery Clear. Upfront pricing.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 4 Light Grey Anti-Tilt Senior Primary Seating

The Cobolt Light Grey Size 4 Chair is the ideal seating transition for students aged 8 to 11 years. Dispatched with Free UK Mainland Delivery, it is built to endure the high-frequency cleaning and heavy daily use required in busy Year 5 and Year 6 classrooms.

The Cobolt Advantage

  • Budget Continuity: Our 15-year structural warranty provides unparalleled financial protection, ensuring your school's capital expenditure remains a one-time investment for over a decade.
  • Surface Resilience: The slate-grey powder-coated steel frame is scratch-resistant, ensuring the furniture retains its professional appearance despite the rigours of daily classroom life.
  • Orderly Environment: The anti-tilt geometry acts as a mechanical safeguard, shifting the balance point to discourage students from tipping over while seated, leading to a safer classroom.

KS2 Alignment & Responsibility

  • Upper Primary Posture: Fully compliant with Size 4 EN1729 standards, the 380mm seat height is precision-engineered to support the stature of 8-11 year olds during critical growth phases.
  • End-of-Life Responsibility: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through its circular economy design.
  • Vandal-Resistant Build: High-security fasteners ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the units in busy environments.

The Cobolt Standard

  • Five Decades of Heritage: We have half a century of experience as a trusted partner to the UK public sector, delivering furniture that exceeds standard compliance benchmarks.
  • Inclusive Logistics: We include UK Mainland shipping as standard, providing clear and transparent costings for your primary school refit project.
  • Domestic Quality Control: UK manufacturing guarantees high-grade finishes, faster lead times, and a significantly lower environmental impact than imported alternatives.

Where is this Light Grey Size 4 Chair used?

The Light Grey Size 4 School Chair is the standard specification for Year 5 and Year 6 Classrooms, Primary IT Suites, Junior Libraries, and After-School Study Zones. Its robust weight capacity combined with senior-primary dimensions makes it a versatile asset for a range of educational and community settings.

Key Features

  • Anti-Tilt Safety Frame – Angled rear legs proactively inhibit students from rocking backwards on two legs.
  • Size 4 (8-11 Years) – Ergonomically sized 380mm seat height for the upper primary age group.
  • 15-Year Structural Guarantee – Industry-leading warranty covering the frame welds and plastic shell integrity.
  • 3.5kg Unit Weight – Exceptionally strong construction that remains manageable for cleaning staff to move and stack.
  • Slate-Grey Steel Frame – High-grade metallic finish that resists scratches and vandal-related wear.
  • Stackable Design – Maximises floor space for physical activities and facilitates efficient evening cleaning routines.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and daily classroom abuse.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Primary Estates

  • Sector Expertise: With fifty years of heritage, we understand the specific durability and hygiene needs of UK primary education.
  • Direct Logistics: We manage the delivery of classroom refits free of charge to the UK mainland, keeping your project within budget.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's green procurement targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific student demographics.

Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for senior primary students, shifting the balance point to proactively prevent dangerous "chair swinging" habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (380mm) and width (370mm) are perfectly scaled for the 8-11 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or tabletop activities.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the slate-grey steel frame.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term reliability.

The Size 4 Light Grey Anti-Tilt Chair combines certified senior-primary ergonomics with an adult-strength safety frame. These specifications detail the materials used to create this durable classroom asset.

Target Ages
8-11 Years (Size 4)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
380mm
Standard Size 4 for Year 5 & 6
Seat Width
370mm
Precision sized for upper primary
Seat Depth
300mm
Full thigh support for KS2 students
Total Dimensions
700mm(H) x 410mm(W) x 480mm(D)
Stable classroom footprint
Unit Weight
3.5kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Scratch and vandal resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Environmentally ethical lifecycle

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

FAQs: Sourcing Seating for Senior Primary Students

Q: Is "Size 4" correct for Year 5 and Year 6 classrooms?

A: Size 4 (380mm seat height) is the ergonomic standard for children aged 8 to 11 years. It ensures that senior primary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during Key Stage 2.

Q: How does the "Anti-Tilt" frame improve classroom management?

A: Older primary students are often more active and prone to rocking on their chairs. The angled rear frame shifts the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively prevents accidents and focus disruptions.

Q: Is Light Grey a practical choice for a busy school?

A: Yes. Light Grey provides a sophisticated, modern aesthetic that reduces visual overstimulation. The polypropylene shell is completely non-porous and resistant to ink and chemicals, allowing for instant sanitisation with standard anti-bacterial cleaners.

Q: What is the maximum weight capacity for these chairs?

A: Despite being dimensioned for junior students, the high-strength slate-grey steel frame is rated for a massive 125kg. This ensures it is robust enough for occasional teacher use and evening community hires without the risk of buckling.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamper-proof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: Does this chair comply with BS EN1729?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for school furniture regarding ergonomics, strength, and structural durability.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 3.5kg build makes them easy to move.

Q: What does the 15-year warranty cover?

A: Our 15-year guarantee covers any structural failure of the welded steel frame and any manufacturing defects in the polypropylene shell. It provides your primary school with a definitive long-term seating solution.

Q: Why purchase from Cobolt Furniture?

A: We are a UK-based manufacturer with over 50 years of experience supplying schools. We provide Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK junior curriculum.

Overview

Product Overview: Size 4 Light Grey Anti-Tilt Senior Primary Seating

The Cobolt Light Grey Size 4 Chair is the ideal seating transition for students aged 8 to 11 years. Dispatched with Free UK Mainland Delivery, it is built to endure the high-frequency cleaning and heavy daily use required in busy Year 5 and Year 6 classrooms.

The Cobolt Advantage

  • Budget Continuity: Our 15-year structural warranty provides unparalleled financial protection, ensuring your school's capital expenditure remains a one-time investment for over a decade.
  • Surface Resilience: The slate-grey powder-coated steel frame is scratch-resistant, ensuring the furniture retains its professional appearance despite the rigours of daily classroom life.
  • Orderly Environment: The anti-tilt geometry acts as a mechanical safeguard, shifting the balance point to discourage students from tipping over while seated, leading to a safer classroom.

KS2 Alignment & Responsibility

  • Upper Primary Posture: Fully compliant with Size 4 EN1729 standards, the 380mm seat height is precision-engineered to support the stature of 8-11 year olds during critical growth phases.
  • End-of-Life Responsibility: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through its circular economy design.
  • Vandal-Resistant Build: High-security fasteners ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the units in busy environments.

The Cobolt Standard

  • Five Decades of Heritage: We have half a century of experience as a trusted partner to the UK public sector, delivering furniture that exceeds standard compliance benchmarks.
  • Inclusive Logistics: We include UK Mainland shipping as standard, providing clear and transparent costings for your primary school refit project.
  • Domestic Quality Control: UK manufacturing guarantees high-grade finishes, faster lead times, and a significantly lower environmental impact than imported alternatives.

Features & Benefits

Where is this Light Grey Size 4 Chair used?

The Light Grey Size 4 School Chair is the standard specification for Year 5 and Year 6 Classrooms, Primary IT Suites, Junior Libraries, and After-School Study Zones. Its robust weight capacity combined with senior-primary dimensions makes it a versatile asset for a range of educational and community settings.

Key Features

  • Anti-Tilt Safety Frame – Angled rear legs proactively inhibit students from rocking backwards on two legs.
  • Size 4 (8-11 Years) – Ergonomically sized 380mm seat height for the upper primary age group.
  • 15-Year Structural Guarantee – Industry-leading warranty covering the frame welds and plastic shell integrity.
  • 3.5kg Unit Weight – Exceptionally strong construction that remains manageable for cleaning staff to move and stack.
  • Slate-Grey Steel Frame – High-grade metallic finish that resists scratches and vandal-related wear.
  • Stackable Design – Maximises floor space for physical activities and facilitates efficient evening cleaning routines.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and daily classroom abuse.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Primary Estates

  • Sector Expertise: With fifty years of heritage, we understand the specific durability and hygiene needs of UK primary education.
  • Direct Logistics: We manage the delivery of classroom refits free of charge to the UK mainland, keeping your project within budget.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's green procurement targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific student demographics.

Safety & Warranty

Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for senior primary students, shifting the balance point to proactively prevent dangerous "chair swinging" habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (380mm) and width (370mm) are perfectly scaled for the 8-11 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or tabletop activities.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the slate-grey steel frame.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term reliability.

Specification Dimensions

The Size 4 Light Grey Anti-Tilt Chair combines certified senior-primary ergonomics with an adult-strength safety frame. These specifications detail the materials used to create this durable classroom asset.

Target Ages
8-11 Years (Size 4)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
380mm
Standard Size 4 for Year 5 & 6
Seat Width
370mm
Precision sized for upper primary
Seat Depth
300mm
Full thigh support for KS2 students
Total Dimensions
700mm(H) x 410mm(W) x 480mm(D)
Stable classroom footprint
Unit Weight
3.5kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Scratch and vandal resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Environmentally ethical lifecycle

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

FAQs: Sourcing Seating for Senior Primary Students

Q: Is "Size 4" correct for Year 5 and Year 6 classrooms?

A: Size 4 (380mm seat height) is the ergonomic standard for children aged 8 to 11 years. It ensures that senior primary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during Key Stage 2.

Q: How does the "Anti-Tilt" frame improve classroom management?

A: Older primary students are often more active and prone to rocking on their chairs. The angled rear frame shifts the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively prevents accidents and focus disruptions.

Q: Is Light Grey a practical choice for a busy school?

A: Yes. Light Grey provides a sophisticated, modern aesthetic that reduces visual overstimulation. The polypropylene shell is completely non-porous and resistant to ink and chemicals, allowing for instant sanitisation with standard anti-bacterial cleaners.

Q: What is the maximum weight capacity for these chairs?

A: Despite being dimensioned for junior students, the high-strength slate-grey steel frame is rated for a massive 125kg. This ensures it is robust enough for occasional teacher use and evening community hires without the risk of buckling.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamper-proof fasteners to secure the shell to the grey steel legs. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: Does this chair comply with BS EN1729?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for school furniture regarding ergonomics, strength, and structural durability.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning staff to clear floor space efficiently after the school day ends. Their lightweight 3.5kg build makes them easy to move.

Q: What does the 15-year warranty cover?

A: Our 15-year guarantee covers any structural failure of the welded steel frame and any manufacturing defects in the polypropylene shell. It provides your primary school with a definitive long-term seating solution.

Q: Why purchase from Cobolt Furniture?

A: We are a UK-based manufacturer with over 50 years of experience supplying schools. We provide Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK junior curriculum.

You may also like

Recently Viewed