A premium white classroom seating solution featuring a tip-resistant leg design and a wipe-clean plastic shell for hygienic school environments.
Supportive educational chair in white with a textured finish and integrated lumbar support, specifically engineered to prevent students from leaning back.
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 White Classic Anti-Tilt Chair

The Cobolt White Size 5 Chair is engineered specifically for students aged 11 to 14 years. Supplied with Free UK Mainland Delivery, it is designed to survive the "school test"—constant movement, heavy daily use, and the high-pressure environment of the modern secondary classroom. By combining proactive safety geometry with an adult-strength frame, it reduces the maintenance burden on school estates while fostering a focused learning atmosphere.

The Cobolt Advantage

  • Budget Longevity: With a 15-year warranty, we eliminate frequent replacement cycles, ensuring your furniture budget goes significantly further over the next decade.
  • Estates-Friendly Design: The high-quality powder-coated steel frame is scratch-resistant and built for durability, ensuring the chair maintains its professional appearance for years.
  • Classroom Safety & Focus: Anti-tilt geometry removes the distraction of "swinging" on chairs, reducing the risk of falls and keeping the classroom environment orderly.

Ergonomics & Sustainability

  • Size 5 Posture Support: Fully compliant with BS EN1729, the 430mm seat height is precision-engineered for users aged 11-14, ensuring posture is supported during critical growth years.
  • Eco-Conscious Choice: Proudly UK-manufactured using 100% recyclable polypropylene and steel components, supporting your school’s environmental and waste targets.
  • Waterfall Edge: The curved front seat maintains healthy blood flow during double periods or exam sessions, preventing student restlessness.

Vandal-Resistant Build

Secondary classroom furniture must be tamper-proof. We utilise high-security fasteners to ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the unit in busy environments.

The Cobolt Standard

  • 50 Years of Heritage: We are a trusted partner to the UK public sector, providing furniture that meets strict education compliance standards.
  • Free UK Mainland Delivery: We absorb shipping costs to keep school procurement simple and transparent.
  • Education Specialist Support: Our UK-based team is on hand to assist with bulk tenders and term-time delivery schedules.

Where is this Size 5 Anti-Tilt Chair used?

The White Size 5 School Chair is the standard for Secondary School Classrooms (Years 7-9), Senior School Libraries, Science Laboratories, and Sixth Form Study Centres. Its adult-strength weight rating and senior student dimensions make it a versatile asset for daily lessons, exams, and community evening use.

Key Features

  • Anti-Tilt Frame – Angled rear legs make it physically difficult for students to tip the chair backwards.
  • Size 5 (11-14 Years) – Standard ergonomic size (430mm seat height) for the Key Stage 3 age group.
  • 15-Year Warranty – Industry-leading guarantee covering all structural welds and shell integrity.
  • Grey Powder-Coated Steel – High-grade metal frame that is scratch-resistant and exceptionally durable.
  • Stackable Design – Efficient vertical stacking allows for easy room clearing and floor maintenance.
  • Ribbed Polypropylene – High-impact shell that is resistant to ink, chemicals, and the rigours of daily school life.
  • Tamper-Proof Fixings – Secured shell-to-frame fasteners for maximum safety and longevity.
  • UK Manufactured – Proudly made in Britain for a low carbon footprint and high quality assurance.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service & Ethos: Supporting School Estates

  • 50 Years of Expertise: We aren't a pop-up shop; we understand the specific durability needs of high-traffic educational environments.
  • Free Delivery (UK Mainland): We handle all logistics costs for classroom refits to keep your project on budget.
  • Sustainability Partners: 100% recyclable components help you meet your school's environmental and waste targets.
  • Reliable Support: Our UK-based team assists with everything from single classroom replacements to full campus tenders.

Built for Safety. Backed for Reliability.

  • The Anti-Tilt frame geometry is specifically engineered to counteract the leverage needed to swing on the chair, protecting both the student and the chair's structural welds.
  • Compliance with BS EN1729 ensures the seat height (430mm) and depth (380mm) are ergonomically correct for users aged 11-14, preventing long-term spinal issues.
  • The Waterfall Seat Front reduces pressure on the back of the thighs, ensuring blood flow is not restricted during long periods of seated study or exams.
  • Heavy-duty Tamper-Proof fasteners keep the shell securely attached to the frame, ensuring safety in busy secondary classrooms.
  • We offer an industry-leading 15-year manufacturer's guarantee. This covers the structural welds of the frame and the integrity of the shell, providing long-term value for school business managers.

The Size 5 White Anti-Tilt Chair offers certified ergonomic support with safety-first anti-tilt engineering. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Material
Recyclable Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Seat Width
405mm
Senior student ergonomic width
Seat Depth
380mm
Full thigh support for older children
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to stack
Frame Material
Powder Coated Steel (Grey)
Durable and scratch-resistant
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Origin
Manufactured in UK
Low carbon footprint

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: Leading Secondary School Seating Solutions

Q: What is a "Size 5" chair and is it suitable for my secondary students?

A: Size 5 is the industry standard for users aged 11 to 14 years. With a 430mm seat height, it is the essential choice for Secondary Schools (Years 7-9), ensuring that students’ feet are flat on the floor to promote spinal health during the transition from primary school.

Q: How does the "Anti-Tilt" feature help with classroom management?

A: Students in secondary education are often active and prone to "chair swinging". The angled rear frame changes the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively reduces classroom accidents and distractions.

Q: Is the white colour difficult to keep clean in a busy school?

A: No. The polypropylene material is non-porous and resistant to ink and common school chemicals. It can be wiped clean instantly with standard anti-bacterial sprays, ensuring your classroom maintains a high level of hygiene.

Q: Can adults or senior students seat on these chairs?

A: Yes. Despite being dimensioned for 11-14 year olds, the high-strength steel frame has an adult-grade load capacity of 125kg. This ensures it is robust enough for senior students and adult staff during community evening hires.

Q: Are these chairs easy for cleaning staff to manage?

A: Yes. Weighing 4.3kg, they are robust but remain manageable for staff. They also stack safely, allowing cleaning staff to clear floor space efficiently after the school day ends.

Q: Does the chair meet UK safety standards?

A: Absolutely. It is fully compliant with BS EN1729, meaning it meets the specific requirements for ergonomic posture and structural durability for use in UK educational settings.

Q: Is it really 100% recyclable?

A: Yes. At the end of its life, the chair can be separated into its plastic and steel components, both of which are fully recyclable. This supports your school’s commitment to environmental sustainability.

Q: What does the 15-year warranty cover?

A: The warranty covers any structural failure in the frame welds or the integrity of the plastic shell due to manufacturing defects. This provides your secondary school with exceptional long-term budget security.

Q: Why choose Cobolt Furniture for secondary school seating?

A: With over 50 years of heritage, we are a trusted partner to UK education providers. We offer Free UK Mainland Delivery, expert advice, and products designed specifically for the rigours of school life.

Overview

Product Overview: Size 5 White Classic Anti-Tilt Chair

The Cobolt White Size 5 Chair is engineered specifically for students aged 11 to 14 years. Supplied with Free UK Mainland Delivery, it is designed to survive the "school test"—constant movement, heavy daily use, and the high-pressure environment of the modern secondary classroom. By combining proactive safety geometry with an adult-strength frame, it reduces the maintenance burden on school estates while fostering a focused learning atmosphere.

The Cobolt Advantage

  • Budget Longevity: With a 15-year warranty, we eliminate frequent replacement cycles, ensuring your furniture budget goes significantly further over the next decade.
  • Estates-Friendly Design: The high-quality powder-coated steel frame is scratch-resistant and built for durability, ensuring the chair maintains its professional appearance for years.
  • Classroom Safety & Focus: Anti-tilt geometry removes the distraction of "swinging" on chairs, reducing the risk of falls and keeping the classroom environment orderly.

Ergonomics & Sustainability

  • Size 5 Posture Support: Fully compliant with BS EN1729, the 430mm seat height is precision-engineered for users aged 11-14, ensuring posture is supported during critical growth years.
  • Eco-Conscious Choice: Proudly UK-manufactured using 100% recyclable polypropylene and steel components, supporting your school’s environmental and waste targets.
  • Waterfall Edge: The curved front seat maintains healthy blood flow during double periods or exam sessions, preventing student restlessness.

Vandal-Resistant Build

Secondary classroom furniture must be tamper-proof. We utilise high-security fasteners to ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the unit in busy environments.

The Cobolt Standard

  • 50 Years of Heritage: We are a trusted partner to the UK public sector, providing furniture that meets strict education compliance standards.
  • Free UK Mainland Delivery: We absorb shipping costs to keep school procurement simple and transparent.
  • Education Specialist Support: Our UK-based team is on hand to assist with bulk tenders and term-time delivery schedules.

Features & Benefits

Where is this Size 5 Anti-Tilt Chair used?

The White Size 5 School Chair is the standard for Secondary School Classrooms (Years 7-9), Senior School Libraries, Science Laboratories, and Sixth Form Study Centres. Its adult-strength weight rating and senior student dimensions make it a versatile asset for daily lessons, exams, and community evening use.

Key Features

  • Anti-Tilt Frame – Angled rear legs make it physically difficult for students to tip the chair backwards.
  • Size 5 (11-14 Years) – Standard ergonomic size (430mm seat height) for the Key Stage 3 age group.
  • 15-Year Warranty – Industry-leading guarantee covering all structural welds and shell integrity.
  • Grey Powder-Coated Steel – High-grade metal frame that is scratch-resistant and exceptionally durable.
  • Stackable Design – Efficient vertical stacking allows for easy room clearing and floor maintenance.
  • Ribbed Polypropylene – High-impact shell that is resistant to ink, chemicals, and the rigours of daily school life.
  • Tamper-Proof Fixings – Secured shell-to-frame fasteners for maximum safety and longevity.
  • UK Manufactured – Proudly made in Britain for a low carbon footprint and high quality assurance.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service & Ethos: Supporting School Estates

  • 50 Years of Expertise: We aren't a pop-up shop; we understand the specific durability needs of high-traffic educational environments.
  • Free Delivery (UK Mainland): We handle all logistics costs for classroom refits to keep your project on budget.
  • Sustainability Partners: 100% recyclable components help you meet your school's environmental and waste targets.
  • Reliable Support: Our UK-based team assists with everything from single classroom replacements to full campus tenders.

Safety & Warranty

Built for Safety. Backed for Reliability.

  • The Anti-Tilt frame geometry is specifically engineered to counteract the leverage needed to swing on the chair, protecting both the student and the chair's structural welds.
  • Compliance with BS EN1729 ensures the seat height (430mm) and depth (380mm) are ergonomically correct for users aged 11-14, preventing long-term spinal issues.
  • The Waterfall Seat Front reduces pressure on the back of the thighs, ensuring blood flow is not restricted during long periods of seated study or exams.
  • Heavy-duty Tamper-Proof fasteners keep the shell securely attached to the frame, ensuring safety in busy secondary classrooms.
  • We offer an industry-leading 15-year manufacturer's guarantee. This covers the structural welds of the frame and the integrity of the shell, providing long-term value for school business managers.

Specification Dimensions

The Size 5 White Anti-Tilt Chair offers certified ergonomic support with safety-first anti-tilt engineering. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Material
Recyclable Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Seat Width
405mm
Senior student ergonomic width
Seat Depth
380mm
Full thigh support for older children
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to stack
Frame Material
Powder Coated Steel (Grey)
Durable and scratch-resistant
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Origin
Manufactured in UK
Low carbon footprint

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: Leading Secondary School Seating Solutions

Q: What is a "Size 5" chair and is it suitable for my secondary students?

A: Size 5 is the industry standard for users aged 11 to 14 years. With a 430mm seat height, it is the essential choice for Secondary Schools (Years 7-9), ensuring that students’ feet are flat on the floor to promote spinal health during the transition from primary school.

Q: How does the "Anti-Tilt" feature help with classroom management?

A: Students in secondary education are often active and prone to "chair swinging". The angled rear frame changes the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively reduces classroom accidents and distractions.

Q: Is the white colour difficult to keep clean in a busy school?

A: No. The polypropylene material is non-porous and resistant to ink and common school chemicals. It can be wiped clean instantly with standard anti-bacterial sprays, ensuring your classroom maintains a high level of hygiene.

Q: Can adults or senior students seat on these chairs?

A: Yes. Despite being dimensioned for 11-14 year olds, the high-strength steel frame has an adult-grade load capacity of 125kg. This ensures it is robust enough for senior students and adult staff during community evening hires.

Q: Are these chairs easy for cleaning staff to manage?

A: Yes. Weighing 4.3kg, they are robust but remain manageable for staff. They also stack safely, allowing cleaning staff to clear floor space efficiently after the school day ends.

Q: Does the chair meet UK safety standards?

A: Absolutely. It is fully compliant with BS EN1729, meaning it meets the specific requirements for ergonomic posture and structural durability for use in UK educational settings.

Q: Is it really 100% recyclable?

A: Yes. At the end of its life, the chair can be separated into its plastic and steel components, both of which are fully recyclable. This supports your school’s commitment to environmental sustainability.

Q: What does the 15-year warranty cover?

A: The warranty covers any structural failure in the frame welds or the integrity of the plastic shell due to manufacturing defects. This provides your secondary school with exceptional long-term budget security.

Q: Why choose Cobolt Furniture for secondary school seating?

A: With over 50 years of heritage, we are a trusted partner to UK education providers. We offer Free UK Mainland Delivery, expert advice, and products designed specifically for the rigours of school life.

White Classic Polypropylene Anti-Tilt School Chair - Size 5 - Ages 11-14

Product code: CH45WH
Modernise your secondary school and Key Stage 3 learning environments with the Cobolt White Classic Polypropylene School Chair (Size 5 / 11-14 Years)....

Inc VAT

Exc VAT

£56.00

£46.67

Colours - White
Age - 11-14 Years

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Trusted UK Supplier 50 years. Established. Reliable.

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Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 White Classic Anti-Tilt Chair

The Cobolt White Size 5 Chair is engineered specifically for students aged 11 to 14 years. Supplied with Free UK Mainland Delivery, it is designed to survive the "school test"—constant movement, heavy daily use, and the high-pressure environment of the modern secondary classroom. By combining proactive safety geometry with an adult-strength frame, it reduces the maintenance burden on school estates while fostering a focused learning atmosphere.

The Cobolt Advantage

  • Budget Longevity: With a 15-year warranty, we eliminate frequent replacement cycles, ensuring your furniture budget goes significantly further over the next decade.
  • Estates-Friendly Design: The high-quality powder-coated steel frame is scratch-resistant and built for durability, ensuring the chair maintains its professional appearance for years.
  • Classroom Safety & Focus: Anti-tilt geometry removes the distraction of "swinging" on chairs, reducing the risk of falls and keeping the classroom environment orderly.

Ergonomics & Sustainability

  • Size 5 Posture Support: Fully compliant with BS EN1729, the 430mm seat height is precision-engineered for users aged 11-14, ensuring posture is supported during critical growth years.
  • Eco-Conscious Choice: Proudly UK-manufactured using 100% recyclable polypropylene and steel components, supporting your school’s environmental and waste targets.
  • Waterfall Edge: The curved front seat maintains healthy blood flow during double periods or exam sessions, preventing student restlessness.

Vandal-Resistant Build

Secondary classroom furniture must be tamper-proof. We utilise high-security fasteners to ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the unit in busy environments.

The Cobolt Standard

  • 50 Years of Heritage: We are a trusted partner to the UK public sector, providing furniture that meets strict education compliance standards.
  • Free UK Mainland Delivery: We absorb shipping costs to keep school procurement simple and transparent.
  • Education Specialist Support: Our UK-based team is on hand to assist with bulk tenders and term-time delivery schedules.

Where is this Size 5 Anti-Tilt Chair used?

The White Size 5 School Chair is the standard for Secondary School Classrooms (Years 7-9), Senior School Libraries, Science Laboratories, and Sixth Form Study Centres. Its adult-strength weight rating and senior student dimensions make it a versatile asset for daily lessons, exams, and community evening use.

Key Features

  • Anti-Tilt Frame – Angled rear legs make it physically difficult for students to tip the chair backwards.
  • Size 5 (11-14 Years) – Standard ergonomic size (430mm seat height) for the Key Stage 3 age group.
  • 15-Year Warranty – Industry-leading guarantee covering all structural welds and shell integrity.
  • Grey Powder-Coated Steel – High-grade metal frame that is scratch-resistant and exceptionally durable.
  • Stackable Design – Efficient vertical stacking allows for easy room clearing and floor maintenance.
  • Ribbed Polypropylene – High-impact shell that is resistant to ink, chemicals, and the rigours of daily school life.
  • Tamper-Proof Fixings – Secured shell-to-frame fasteners for maximum safety and longevity.
  • UK Manufactured – Proudly made in Britain for a low carbon footprint and high quality assurance.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service & Ethos: Supporting School Estates

  • 50 Years of Expertise: We aren't a pop-up shop; we understand the specific durability needs of high-traffic educational environments.
  • Free Delivery (UK Mainland): We handle all logistics costs for classroom refits to keep your project on budget.
  • Sustainability Partners: 100% recyclable components help you meet your school's environmental and waste targets.
  • Reliable Support: Our UK-based team assists with everything from single classroom replacements to full campus tenders.

Built for Safety. Backed for Reliability.

  • The Anti-Tilt frame geometry is specifically engineered to counteract the leverage needed to swing on the chair, protecting both the student and the chair's structural welds.
  • Compliance with BS EN1729 ensures the seat height (430mm) and depth (380mm) are ergonomically correct for users aged 11-14, preventing long-term spinal issues.
  • The Waterfall Seat Front reduces pressure on the back of the thighs, ensuring blood flow is not restricted during long periods of seated study or exams.
  • Heavy-duty Tamper-Proof fasteners keep the shell securely attached to the frame, ensuring safety in busy secondary classrooms.
  • We offer an industry-leading 15-year manufacturer's guarantee. This covers the structural welds of the frame and the integrity of the shell, providing long-term value for school business managers.

The Size 5 White Anti-Tilt Chair offers certified ergonomic support with safety-first anti-tilt engineering. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Material
Recyclable Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Seat Width
405mm
Senior student ergonomic width
Seat Depth
380mm
Full thigh support for older children
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to stack
Frame Material
Powder Coated Steel (Grey)
Durable and scratch-resistant
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Origin
Manufactured in UK
Low carbon footprint

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: Leading Secondary School Seating Solutions

Q: What is a "Size 5" chair and is it suitable for my secondary students?

A: Size 5 is the industry standard for users aged 11 to 14 years. With a 430mm seat height, it is the essential choice for Secondary Schools (Years 7-9), ensuring that students’ feet are flat on the floor to promote spinal health during the transition from primary school.

Q: How does the "Anti-Tilt" feature help with classroom management?

A: Students in secondary education are often active and prone to "chair swinging". The angled rear frame changes the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively reduces classroom accidents and distractions.

Q: Is the white colour difficult to keep clean in a busy school?

A: No. The polypropylene material is non-porous and resistant to ink and common school chemicals. It can be wiped clean instantly with standard anti-bacterial sprays, ensuring your classroom maintains a high level of hygiene.

Q: Can adults or senior students seat on these chairs?

A: Yes. Despite being dimensioned for 11-14 year olds, the high-strength steel frame has an adult-grade load capacity of 125kg. This ensures it is robust enough for senior students and adult staff during community evening hires.

Q: Are these chairs easy for cleaning staff to manage?

A: Yes. Weighing 4.3kg, they are robust but remain manageable for staff. They also stack safely, allowing cleaning staff to clear floor space efficiently after the school day ends.

Q: Does the chair meet UK safety standards?

A: Absolutely. It is fully compliant with BS EN1729, meaning it meets the specific requirements for ergonomic posture and structural durability for use in UK educational settings.

Q: Is it really 100% recyclable?

A: Yes. At the end of its life, the chair can be separated into its plastic and steel components, both of which are fully recyclable. This supports your school’s commitment to environmental sustainability.

Q: What does the 15-year warranty cover?

A: The warranty covers any structural failure in the frame welds or the integrity of the plastic shell due to manufacturing defects. This provides your secondary school with exceptional long-term budget security.

Q: Why choose Cobolt Furniture for secondary school seating?

A: With over 50 years of heritage, we are a trusted partner to UK education providers. We offer Free UK Mainland Delivery, expert advice, and products designed specifically for the rigours of school life.

Overview

Product Overview: Size 5 White Classic Anti-Tilt Chair

The Cobolt White Size 5 Chair is engineered specifically for students aged 11 to 14 years. Supplied with Free UK Mainland Delivery, it is designed to survive the "school test"—constant movement, heavy daily use, and the high-pressure environment of the modern secondary classroom. By combining proactive safety geometry with an adult-strength frame, it reduces the maintenance burden on school estates while fostering a focused learning atmosphere.

The Cobolt Advantage

  • Budget Longevity: With a 15-year warranty, we eliminate frequent replacement cycles, ensuring your furniture budget goes significantly further over the next decade.
  • Estates-Friendly Design: The high-quality powder-coated steel frame is scratch-resistant and built for durability, ensuring the chair maintains its professional appearance for years.
  • Classroom Safety & Focus: Anti-tilt geometry removes the distraction of "swinging" on chairs, reducing the risk of falls and keeping the classroom environment orderly.

Ergonomics & Sustainability

  • Size 5 Posture Support: Fully compliant with BS EN1729, the 430mm seat height is precision-engineered for users aged 11-14, ensuring posture is supported during critical growth years.
  • Eco-Conscious Choice: Proudly UK-manufactured using 100% recyclable polypropylene and steel components, supporting your school’s environmental and waste targets.
  • Waterfall Edge: The curved front seat maintains healthy blood flow during double periods or exam sessions, preventing student restlessness.

Vandal-Resistant Build

Secondary classroom furniture must be tamper-proof. We utilise high-security fasteners to ensure the seat shell remains permanently attached to the frame, preventing students from dismantling the unit in busy environments.

The Cobolt Standard

  • 50 Years of Heritage: We are a trusted partner to the UK public sector, providing furniture that meets strict education compliance standards.
  • Free UK Mainland Delivery: We absorb shipping costs to keep school procurement simple and transparent.
  • Education Specialist Support: Our UK-based team is on hand to assist with bulk tenders and term-time delivery schedules.

Features & Benefits

Where is this Size 5 Anti-Tilt Chair used?

The White Size 5 School Chair is the standard for Secondary School Classrooms (Years 7-9), Senior School Libraries, Science Laboratories, and Sixth Form Study Centres. Its adult-strength weight rating and senior student dimensions make it a versatile asset for daily lessons, exams, and community evening use.

Key Features

  • Anti-Tilt Frame – Angled rear legs make it physically difficult for students to tip the chair backwards.
  • Size 5 (11-14 Years) – Standard ergonomic size (430mm seat height) for the Key Stage 3 age group.
  • 15-Year Warranty – Industry-leading guarantee covering all structural welds and shell integrity.
  • Grey Powder-Coated Steel – High-grade metal frame that is scratch-resistant and exceptionally durable.
  • Stackable Design – Efficient vertical stacking allows for easy room clearing and floor maintenance.
  • Ribbed Polypropylene – High-impact shell that is resistant to ink, chemicals, and the rigours of daily school life.
  • Tamper-Proof Fixings – Secured shell-to-frame fasteners for maximum safety and longevity.
  • UK Manufactured – Proudly made in Britain for a low carbon footprint and high quality assurance.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service & Ethos: Supporting School Estates

  • 50 Years of Expertise: We aren't a pop-up shop; we understand the specific durability needs of high-traffic educational environments.
  • Free Delivery (UK Mainland): We handle all logistics costs for classroom refits to keep your project on budget.
  • Sustainability Partners: 100% recyclable components help you meet your school's environmental and waste targets.
  • Reliable Support: Our UK-based team assists with everything from single classroom replacements to full campus tenders.

Safety & Warranty

Built for Safety. Backed for Reliability.

  • The Anti-Tilt frame geometry is specifically engineered to counteract the leverage needed to swing on the chair, protecting both the student and the chair's structural welds.
  • Compliance with BS EN1729 ensures the seat height (430mm) and depth (380mm) are ergonomically correct for users aged 11-14, preventing long-term spinal issues.
  • The Waterfall Seat Front reduces pressure on the back of the thighs, ensuring blood flow is not restricted during long periods of seated study or exams.
  • Heavy-duty Tamper-Proof fasteners keep the shell securely attached to the frame, ensuring safety in busy secondary classrooms.
  • We offer an industry-leading 15-year manufacturer's guarantee. This covers the structural welds of the frame and the integrity of the shell, providing long-term value for school business managers.

Specification Dimensions

The Size 5 White Anti-Tilt Chair offers certified ergonomic support with safety-first anti-tilt engineering. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Material
Recyclable Polypropylene
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Seat Width
405mm
Senior student ergonomic width
Seat Depth
380mm
Full thigh support for older children
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to stack
Frame Material
Powder Coated Steel (Grey)
Durable and scratch-resistant
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Origin
Manufactured in UK
Low carbon footprint

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: Leading Secondary School Seating Solutions

Q: What is a "Size 5" chair and is it suitable for my secondary students?

A: Size 5 is the industry standard for users aged 11 to 14 years. With a 430mm seat height, it is the essential choice for Secondary Schools (Years 7-9), ensuring that students’ feet are flat on the floor to promote spinal health during the transition from primary school.

Q: How does the "Anti-Tilt" feature help with classroom management?

A: Students in secondary education are often active and prone to "chair swinging". The angled rear frame changes the leverage point, making it mechanically difficult for the chair to tip backwards. This proactively reduces classroom accidents and distractions.

Q: Is the white colour difficult to keep clean in a busy school?

A: No. The polypropylene material is non-porous and resistant to ink and common school chemicals. It can be wiped clean instantly with standard anti-bacterial sprays, ensuring your classroom maintains a high level of hygiene.

Q: Can adults or senior students seat on these chairs?

A: Yes. Despite being dimensioned for 11-14 year olds, the high-strength steel frame has an adult-grade load capacity of 125kg. This ensures it is robust enough for senior students and adult staff during community evening hires.

Q: Are these chairs easy for cleaning staff to manage?

A: Yes. Weighing 4.3kg, they are robust but remain manageable for staff. They also stack safely, allowing cleaning staff to clear floor space efficiently after the school day ends.

Q: Does the chair meet UK safety standards?

A: Absolutely. It is fully compliant with BS EN1729, meaning it meets the specific requirements for ergonomic posture and structural durability for use in UK educational settings.

Q: Is it really 100% recyclable?

A: Yes. At the end of its life, the chair can be separated into its plastic and steel components, both of which are fully recyclable. This supports your school’s commitment to environmental sustainability.

Q: What does the 15-year warranty cover?

A: The warranty covers any structural failure in the frame welds or the integrity of the plastic shell due to manufacturing defects. This provides your secondary school with exceptional long-term budget security.

Q: Why choose Cobolt Furniture for secondary school seating?

A: With over 50 years of heritage, we are a trusted partner to UK education providers. We offer Free UK Mainland Delivery, expert advice, and products designed specifically for the rigours of school life.

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