A sunny yellow school chair featuring a shatter-resistant polypropylene shell and a safety-angled base to ensure four-leg stability at all times.
Canary yellow educational chair with integrated lumbar support and a non-toxic powder-coated frame, perfect for early years and primary classrooms.
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 5 Yellow Anti-Tilt Secondary Seating

The Cobolt Yellow Size 5 Chair delivers a durable, ergonomic foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is engineered to survive the high-frequency sanitisation and heavy daily use required in modern secondary classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical secondary growth phases.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair can be fully repurposed at the end of its service life to support green targets.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • High-Impact Shell: The non-porous yellow polypropylene resists staining and allows staff to maintain hygiene standards with a simple wipe-down procedure.
  • Secondary Safety Engineering: The specialized anti-tilt legs act as a mechanical safeguard, shifting the balance point to prevent tipping.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to ensure the seat remains permanently and safely attached to the grey frame.

The Cobolt Standard

  • Heritage Quality Benchmarks: Drawing on 50 years of educational supply history, we create seating that prioritises student safety and long-term structural rigidity.
  • Complimentary Delivery Policy: We absorb all shipping costs via our Free UK Mainland Delivery service, providing a simplified and honest pricing structure for school bursars.
  • Premier 15-Year Security: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture assets for the long term.

Where is this Size 5 Yellow Anti-Tilt Chair utilised?

The Yellow Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Senior School IT Suites, Science Laboratories, and Secondary Libraries. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Schools

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Secondary Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary learners, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) is perfectly scaled for the 11-14 year old stature, promoting healthy spinal alignment.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

The Size 5 Yellow Anti-Tilt Chair combines certified secondary ergonomics with a heavy-duty safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 learning environments.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Years 7 through 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product 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: Secondary Classroom Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during their transition through high school.

Q: How does the "Anti-Tilt" mechanism prevent accidents?

A: Active secondary students are often prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Solar Yellow pigment resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, school supplies, or juice cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid lemon colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

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

A: Absolutely. We use industrial-grade tamperproof 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: 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 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

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

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK curriculum.

Overview

Product Overview: Size 5 Yellow Anti-Tilt Secondary Seating

The Cobolt Yellow Size 5 Chair delivers a durable, ergonomic foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is engineered to survive the high-frequency sanitisation and heavy daily use required in modern secondary classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical secondary growth phases.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair can be fully repurposed at the end of its service life to support green targets.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • High-Impact Shell: The non-porous yellow polypropylene resists staining and allows staff to maintain hygiene standards with a simple wipe-down procedure.
  • Secondary Safety Engineering: The specialized anti-tilt legs act as a mechanical safeguard, shifting the balance point to prevent tipping.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to ensure the seat remains permanently and safely attached to the grey frame.

The Cobolt Standard

  • Heritage Quality Benchmarks: Drawing on 50 years of educational supply history, we create seating that prioritises student safety and long-term structural rigidity.
  • Complimentary Delivery Policy: We absorb all shipping costs via our Free UK Mainland Delivery service, providing a simplified and honest pricing structure for school bursars.
  • Premier 15-Year Security: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture assets for the long term.

Features & Benefits

Where is this Size 5 Yellow Anti-Tilt Chair utilised?

The Yellow Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Senior School IT Suites, Science Laboratories, and Secondary Libraries. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Schools

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Safety & Warranty

Secondary Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary learners, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) is perfectly scaled for the 11-14 year old stature, promoting healthy spinal alignment.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

Specification Dimensions

The Size 5 Yellow Anti-Tilt Chair combines certified secondary ergonomics with a heavy-duty safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 learning environments.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Years 7 through 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product 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: Secondary Classroom Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during their transition through high school.

Q: How does the "Anti-Tilt" mechanism prevent accidents?

A: Active secondary students are often prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Solar Yellow pigment resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, school supplies, or juice cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid lemon colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

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

A: Absolutely. We use industrial-grade tamperproof 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: 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 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

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

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK curriculum.

Yellow Anti-Tilt Secondary School Chair - Size 5 - 11-14 Years - Grey Legs

Product code: CH45YE
Introduce a sun-drenched, optimistic aesthetic to your secondary learning environments with the Cobolt Solar Yellow Polypropylene Anti-Tilt Chair (Siz...

Inc VAT

Exc VAT

£56.00

£46.67

Colours - Yellow
Age - 11-14 Years

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Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Yellow Anti-Tilt Secondary Seating

The Cobolt Yellow Size 5 Chair delivers a durable, ergonomic foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is engineered to survive the high-frequency sanitisation and heavy daily use required in modern secondary classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical secondary growth phases.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair can be fully repurposed at the end of its service life to support green targets.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • High-Impact Shell: The non-porous yellow polypropylene resists staining and allows staff to maintain hygiene standards with a simple wipe-down procedure.
  • Secondary Safety Engineering: The specialized anti-tilt legs act as a mechanical safeguard, shifting the balance point to prevent tipping.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to ensure the seat remains permanently and safely attached to the grey frame.

The Cobolt Standard

  • Heritage Quality Benchmarks: Drawing on 50 years of educational supply history, we create seating that prioritises student safety and long-term structural rigidity.
  • Complimentary Delivery Policy: We absorb all shipping costs via our Free UK Mainland Delivery service, providing a simplified and honest pricing structure for school bursars.
  • Premier 15-Year Security: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture assets for the long term.

Where is this Size 5 Yellow Anti-Tilt Chair utilised?

The Yellow Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Senior School IT Suites, Science Laboratories, and Secondary Libraries. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Schools

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Secondary Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary learners, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) is perfectly scaled for the 11-14 year old stature, promoting healthy spinal alignment.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

The Size 5 Yellow Anti-Tilt Chair combines certified secondary ergonomics with a heavy-duty safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 learning environments.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Years 7 through 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product 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: Secondary Classroom Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during their transition through high school.

Q: How does the "Anti-Tilt" mechanism prevent accidents?

A: Active secondary students are often prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Solar Yellow pigment resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, school supplies, or juice cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid lemon colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

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

A: Absolutely. We use industrial-grade tamperproof 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: 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 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

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

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK curriculum.

Overview

Product Overview: Size 5 Yellow Anti-Tilt Secondary Seating

The Cobolt Yellow Size 5 Chair delivers a durable, ergonomic foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is engineered to survive the high-frequency sanitisation and heavy daily use required in modern secondary classrooms.

Senior Posture & Sustainability

  • KS3 Ergonomic Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical secondary growth phases.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair can be fully repurposed at the end of its service life to support green targets.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • High-Impact Shell: The non-porous yellow polypropylene resists staining and allows staff to maintain hygiene standards with a simple wipe-down procedure.
  • Secondary Safety Engineering: The specialized anti-tilt legs act as a mechanical safeguard, shifting the balance point to prevent tipping.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to ensure the seat remains permanently and safely attached to the grey frame.

The Cobolt Standard

  • Heritage Quality Benchmarks: Drawing on 50 years of educational supply history, we create seating that prioritises student safety and long-term structural rigidity.
  • Complimentary Delivery Policy: We absorb all shipping costs via our Free UK Mainland Delivery service, providing a simplified and honest pricing structure for school bursars.
  • Premier 15-Year Security: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture assets for the long term.

Features & Benefits

Where is this Size 5 Yellow Anti-Tilt Chair utilised?

The Yellow Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Senior School IT Suites, Science Laboratories, and Secondary Libraries. Its adult-strength frame combined with student-specific dimensions makes it an incredibly versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Schools

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution's carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Safety & Warranty

Secondary Safety Engineering. Guaranteed Performance.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary learners, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) is perfectly scaled for the 11-14 year old stature, promoting healthy spinal alignment.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated learning or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer's guarantee, covering structural frame integrity and shell defects for long-term institutional use.

Specification Dimensions

The Size 5 Yellow Anti-Tilt Chair combines certified secondary ergonomics with a heavy-duty safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 learning environments.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Years 7 through 9
Seat Dimensions
405mm (W) x 380mm (D)
Ergonomically sized for mid-secondary students
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Frame Finish
Slate Grey Powder Coated Steel
Vandal and scratch resistant finish
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly product 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: Secondary Classroom Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, which is essential for maintaining correct sitting habits during their transition through high school.

Q: How does the "Anti-Tilt" mechanism prevent accidents?

A: Active secondary students are often prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing falls.

Q: Is the Solar Yellow pigment resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, school supplies, or juice cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid lemon colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group sessions without structural risk.

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

A: Absolutely. We use industrial-grade tamperproof 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: 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 4.3kg build makes them easy to move for reconfiguration.

Q: Does this chair comply with fire and safety regulations?

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

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for the demands of the UK curriculum.

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