A neutral oatmeal beige school chair with a textured finish and anti-lean geometry, providing a calm aesthetic for focus-heavy learning environments.
Sand-toned educational seat featuring high-strength moulded plastic and a low-maintenance grey frame, specifically designed for university or college breakout areas.
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 Oatmeal Anti-Tilt Secondary Seating

The Cobolt Oatmeal Size 5 Chair provides a durable and ergonomically sound foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and rigorous daily use required in busy Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical growth phases in secondary education.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Circular Economy Choice: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through a fully repurposable design.

Institutional Resilience

  • Non-Porous Shell: The high-grade oatmeal polypropylene resists staining from ink and school supplies, allowing for instant sanitisation with standard cleaners.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to lock the shell to the grey steel frame, ensuring a permanent, rattle-free connection.
  • Stackable Architecture: Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing after the academic day ends.

The Cobolt Standard

  • 50 Years of UK Manufacturing: Our five decades of industry experience ensure that every secondary-sized chair is built to withstand the unique rigours of senior learning environments.
  • Zero-Cost Shipping: Take advantage of our Free UK Mainland Delivery service, designed to keep your school refit project strictly within its financial limits.
  • Comprehensive 15-Year Warranty: We provide a decade-and-a-half of structural protection, covering both the high-impact shell and the high-tensile frame welds.

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

The Oatmeal Beige Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Secondary IT Suites, Science Laboratories, and Senior School Libraries. Its adult-strength frame combined with student-specific proportions makes it a 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 the welded steel frame and the high-impact shell.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coated Steel – 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. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • 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 Oatmeal 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 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
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
Weight Capacity
125kg (19.6 stone)
Exceptional structural resilience
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: Senior 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 the transition from primary school.

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

A: Secondary students are often active and 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 Oatmeal shell resistant to staining?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school supplies, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the neutral beige 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 high can these chairs be safely stacked?

A: These units are designed for safe 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 secondary 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 modern curriculum.

Overview

Product Overview: Size 5 Oatmeal Anti-Tilt Secondary Seating

The Cobolt Oatmeal Size 5 Chair provides a durable and ergonomically sound foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and rigorous daily use required in busy Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical growth phases in secondary education.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Circular Economy Choice: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through a fully repurposable design.

Institutional Resilience

  • Non-Porous Shell: The high-grade oatmeal polypropylene resists staining from ink and school supplies, allowing for instant sanitisation with standard cleaners.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to lock the shell to the grey steel frame, ensuring a permanent, rattle-free connection.
  • Stackable Architecture: Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing after the academic day ends.

The Cobolt Standard

  • 50 Years of UK Manufacturing: Our five decades of industry experience ensure that every secondary-sized chair is built to withstand the unique rigours of senior learning environments.
  • Zero-Cost Shipping: Take advantage of our Free UK Mainland Delivery service, designed to keep your school refit project strictly within its financial limits.
  • Comprehensive 15-Year Warranty: We provide a decade-and-a-half of structural protection, covering both the high-impact shell and the high-tensile frame welds.

Features & Benefits

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

The Oatmeal Beige Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Secondary IT Suites, Science Laboratories, and Senior School Libraries. Its adult-strength frame combined with student-specific proportions makes it a 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 the welded steel frame and the high-impact shell.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coated Steel – 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. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • 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 Oatmeal 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 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
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
Weight Capacity
125kg (19.6 stone)
Exceptional structural resilience
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: Senior 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 the transition from primary school.

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

A: Secondary students are often active and 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 Oatmeal shell resistant to staining?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school supplies, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the neutral beige 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 high can these chairs be safely stacked?

A: These units are designed for safe 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 secondary 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 modern curriculum.

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

Product code: CH45OA
Incorporate a sophisticated and calming aesthetic into your senior learning environments with the Cobolt Oatmeal Beige Polypropylene Anti-Tilt Chair (...

Inc VAT

Exc VAT

£56.00

£46.67

Colours - Oatmeal Beige
Age - 11-14 Years

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Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Oatmeal Anti-Tilt Secondary Seating

The Cobolt Oatmeal Size 5 Chair provides a durable and ergonomically sound foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and rigorous daily use required in busy Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical growth phases in secondary education.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Circular Economy Choice: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through a fully repurposable design.

Institutional Resilience

  • Non-Porous Shell: The high-grade oatmeal polypropylene resists staining from ink and school supplies, allowing for instant sanitisation with standard cleaners.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to lock the shell to the grey steel frame, ensuring a permanent, rattle-free connection.
  • Stackable Architecture: Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing after the academic day ends.

The Cobolt Standard

  • 50 Years of UK Manufacturing: Our five decades of industry experience ensure that every secondary-sized chair is built to withstand the unique rigours of senior learning environments.
  • Zero-Cost Shipping: Take advantage of our Free UK Mainland Delivery service, designed to keep your school refit project strictly within its financial limits.
  • Comprehensive 15-Year Warranty: We provide a decade-and-a-half of structural protection, covering both the high-impact shell and the high-tensile frame welds.

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

The Oatmeal Beige Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Secondary IT Suites, Science Laboratories, and Senior School Libraries. Its adult-strength frame combined with student-specific proportions makes it a 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 the welded steel frame and the high-impact shell.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coated Steel – 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. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • 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 Oatmeal 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 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
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
Weight Capacity
125kg (19.6 stone)
Exceptional structural resilience
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: Senior 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 the transition from primary school.

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

A: Secondary students are often active and 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 Oatmeal shell resistant to staining?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school supplies, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the neutral beige 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 high can these chairs be safely stacked?

A: These units are designed for safe 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 secondary 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 modern curriculum.

Overview

Product Overview: Size 5 Oatmeal Anti-Tilt Secondary Seating

The Cobolt Oatmeal Size 5 Chair provides a durable and ergonomically sound foundation for students aged 11 to 14 years. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and rigorous daily use required in busy Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Support: Fully compliant with Size 5 EN1729 standards, the 430mm seat height is precision-engineered to support students during critical growth phases in secondary education.
  • Improved Blood Flow: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.
  • Circular Economy Choice: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution's carbon reduction targets through a fully repurposable design.

Institutional Resilience

  • Non-Porous Shell: The high-grade oatmeal polypropylene resists staining from ink and school supplies, allowing for instant sanitisation with standard cleaners.
  • Vandal-Resistant Fixings: We utilize industrial-grade, tamperproof fasteners to lock the shell to the grey steel frame, ensuring a permanent, rattle-free connection.
  • Stackable Architecture: Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing after the academic day ends.

The Cobolt Standard

  • 50 Years of UK Manufacturing: Our five decades of industry experience ensure that every secondary-sized chair is built to withstand the unique rigours of senior learning environments.
  • Zero-Cost Shipping: Take advantage of our Free UK Mainland Delivery service, designed to keep your school refit project strictly within its financial limits.
  • Comprehensive 15-Year Warranty: We provide a decade-and-a-half of structural protection, covering both the high-impact shell and the high-tensile frame welds.

Features & Benefits

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

The Oatmeal Beige Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Secondary IT Suites, Science Laboratories, and Senior School Libraries. Its adult-strength frame combined with student-specific proportions makes it a 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 the welded steel frame and the high-impact shell.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coated Steel – 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. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary students, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • 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 Oatmeal 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 classrooms.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
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
Weight Capacity
125kg (19.6 stone)
Exceptional structural resilience
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: Senior 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 the transition from primary school.

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

A: Secondary students are often active and 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 Oatmeal shell resistant to staining?

A: Yes. The high-grade polypropylene is non-porous. Spills from common school supplies, ink, or paints cannot penetrate the surface and can be wiped away easily without leaving residues or fading the neutral beige 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 high can these chairs be safely stacked?

A: These units are designed for safe 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 secondary 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 modern curriculum.

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