Blue plastic chair with angled metal legs and rectangular backrest cutout, designed for educational use.
Blue classroom chair with feature tags for UK manufacture, BS EN1729 compliance, and stackability up to 10 high.
Specification chart showing chair sizes for different age groups with seat dimensions, popliteal height, and BS EN1729 compliance, plus colour-coded foot illustrations for each size mark.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Blue Reinforced Secondary Chair

The Cobolt Blue Reinforced Chair is built to withstand the rigorous routine of the secondary school day. Shipped with Free UK Mainland Delivery, it is designed to survive the "KS3 challenge"—heavier student use, constant classroom changes, and the high-traffic environment of an academy.

The Cobolt Advantage

  • Budget Security: Our comprehensive 15-year guarantee acts as a financial shield, ensuring your furniture expenditure delivers value well into the next decade.
  • Venue Adaptability: Unlike bulky alternative options, this model stacks securely up to 10 high, allowing exam halls and drama studios to be cleared in minutes.
  • Instant Recognition: The feet are fitted with colour-coded caps corresponding to the Size 5 specification, enabling site managers to instantly sort furniture by year group.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Precision-scaled for the 11-14 demographic (Size 5), the shell supports the spine to prevent slouching during intense study periods.
  • Circular Economy: The chair is designed for full recyclability, easily separating into wood, metal, and plastic components to support your school's green initiatives.
  • Focused Comfort: The moulded backrest provides essential lumbar reinforcement, helping secondary students maintain concentration during double periods.

Tamper-Free Construction

Student safety is non-negotiable. We employ a unique "no nuts or screws" assembly technique, removing small parts and sharp edges to create a completely secure and snag-proof unit.

The Cobolt Standard

  • 50 Years of Heritage: We have spent five decades supplying the UK education sector, ensuring our products consistently meet the strictest safety and quality standards.
  • Free UK Mainland Delivery: We manage all logistics at no extra cost, providing a simple, transparent, and budget-friendly procurement experience.
  • Project Support: Our UK-based team is on hand to assist with secondary school refits, ensuring your furniture arrives exactly as planned.

Where is this Size 5 Anti-Tilt Chair used?

The Blue Reinforced Secondary Chair is the standard specification for Year 7, 8 and 9 Classrooms, Science Labs, School Dining Halls, and Exam Halls. Its reinforced build and specific dimensions (Size 5) make it the ideal solution for students aged 11 to 14.

Key Features

  • Anti-Tilt Geometry – Stable base prevents tipping accidents during active lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for growing teenagers.
  • Size 5 (11-14 Years) – Ergonomically fit for Key Stage 3 pupils.
  • 15-Year Warranty – Extensive cover for the frame and shell structure.
  • Smooth Profile – No exposed screws or nuts to catch clothing or fingers.
  • Stackable 10-High – Maximises floor space efficiency in multi-use areas.
  • Colour-Coded Feet – Simplifies size identification for staff.
  • UK Manufactured – High-quality British production with a low carbon footprint.
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 understand the unique safety and durability requirements of secondary school furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to help your school make the most of its budget.
  • Sustainability Partners: Fully recyclable materials help your institution achieve its green objectives.
  • Reliable Support: Our experienced team is on hand to guide you from product selection to final delivery.

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, reducing the likelihood of students tipping backwards during class.
  • Compliance with BS EN1729 Part 1 ensures the 430mm seat height is ergonomically correct for the 11-14 age group, supporting rapid growth spurts.
  • The Snag-Free Construction removes all nuts and screws, creating a seamless surface that eliminates the risk of scratches or caught blazers.
  • A Reinforced Undercarriage adds significant structural strength, ensuring the chair can withstand the wear and tear of a busy secondary environment.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and plastic shell, providing total peace of mind for business managers.

The Size 5 Blue Reinforced Chair combines certified ergonomic support with secondary school safety engineering. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3.

Age Group
11-14 Years (Size 5)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7, 8 & 9
Total Dimensions
430mm(H) x 394mm(W) x 400mm(D)
Scaled profile for secondary pupils
Leg Finish
Grey Metal
Durable and neutral
Construction
Reinforced Undercarriage
Enhanced structural life
Safety Feature
No Nuts or Screws
Anti-tamper and snag-free
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports eco-friendly targets
Compliance
BS EN1729 Parts 1 & 2
Certified for education use
Origin
Manufactured in UK
Quality assurance

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 20 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: The UK’s Leading School Seating Solutions

Q: Is "Size 5" the correct choice for my students?

A: Yes. Size 5 is the industry standard for students aged 11 to 14 years, typically in Years 7, 8, and 9. With a seat height of 430mm, it allows pupils to sit with feet flat on the floor, which is vital for comfort and posture during the early secondary years.

Q: Why is the "no nuts or screws" design beneficial?

A: In a busy academy setting, safety and durability are key. By removing external fixings, we eliminate the risk of students tampering with parts or snagging their blazers on sharp edges, creating a smoother, safer chair that requires less maintenance.

Q: Can I stack these chairs 10 high safely?

A: Absolutely. This reinforced model is specifically engineered to stack stably up to 10 units high, making it incredibly easy to clear classrooms for drama or dining halls for cleaning.

Q: Does this chair comply with BS EN1729?

A: Yes. It is fully compliant with BS EN1729 Parts 1 & 2. Part 1 covers the ergonomic dimensions required for healthy spinal development, while Part 2 certifies the structural strength for institutional use.

Q: What is the purpose of the "colour coded feet"?

A: The feet are coloured to correspond with the "Size 5" specification. This allows staff to instantly identify the correct furniture for the 11-14 year age group, preventing mix-ups in schools with multiple key stages.

Q: How durable is the "reinforced undercarriage"?

A: It is designed for exceptional longevity. The extra steel reinforcement under the seat ensures the chair can withstand the high-impact use of secondary students far better than standard plastic chairs, backed by our 15-year warranty.

Q: Is the Blue plastic easy to clean?

A: Yes. The shell is durable and non-porous. It can be wiped down easily with a non-abrasive cleaner and a warm damp cloth, making it simple to maintain hygiene standards after art lessons or lunch.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, a market-leading 15-year warranty, and expert advice to ensure your procurement process is effortless.

Overview

Product Overview: Size 5 Blue Reinforced Secondary Chair

The Cobolt Blue Reinforced Chair is built to withstand the rigorous routine of the secondary school day. Shipped with Free UK Mainland Delivery, it is designed to survive the "KS3 challenge"—heavier student use, constant classroom changes, and the high-traffic environment of an academy.

The Cobolt Advantage

  • Budget Security: Our comprehensive 15-year guarantee acts as a financial shield, ensuring your furniture expenditure delivers value well into the next decade.
  • Venue Adaptability: Unlike bulky alternative options, this model stacks securely up to 10 high, allowing exam halls and drama studios to be cleared in minutes.
  • Instant Recognition: The feet are fitted with colour-coded caps corresponding to the Size 5 specification, enabling site managers to instantly sort furniture by year group.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Precision-scaled for the 11-14 demographic (Size 5), the shell supports the spine to prevent slouching during intense study periods.
  • Circular Economy: The chair is designed for full recyclability, easily separating into wood, metal, and plastic components to support your school's green initiatives.
  • Focused Comfort: The moulded backrest provides essential lumbar reinforcement, helping secondary students maintain concentration during double periods.

Tamper-Free Construction

Student safety is non-negotiable. We employ a unique "no nuts or screws" assembly technique, removing small parts and sharp edges to create a completely secure and snag-proof unit.

The Cobolt Standard

  • 50 Years of Heritage: We have spent five decades supplying the UK education sector, ensuring our products consistently meet the strictest safety and quality standards.
  • Free UK Mainland Delivery: We manage all logistics at no extra cost, providing a simple, transparent, and budget-friendly procurement experience.
  • Project Support: Our UK-based team is on hand to assist with secondary school refits, ensuring your furniture arrives exactly as planned.

Features & Benefits

Where is this Size 5 Anti-Tilt Chair used?

The Blue Reinforced Secondary Chair is the standard specification for Year 7, 8 and 9 Classrooms, Science Labs, School Dining Halls, and Exam Halls. Its reinforced build and specific dimensions (Size 5) make it the ideal solution for students aged 11 to 14.

Key Features

  • Anti-Tilt Geometry – Stable base prevents tipping accidents during active lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for growing teenagers.
  • Size 5 (11-14 Years) – Ergonomically fit for Key Stage 3 pupils.
  • 15-Year Warranty – Extensive cover for the frame and shell structure.
  • Smooth Profile – No exposed screws or nuts to catch clothing or fingers.
  • Stackable 10-High – Maximises floor space efficiency in multi-use areas.
  • Colour-Coded Feet – Simplifies size identification for staff.
  • UK Manufactured – High-quality British production with a low carbon footprint.
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 understand the unique safety and durability requirements of secondary school furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to help your school make the most of its budget.
  • Sustainability Partners: Fully recyclable materials help your institution achieve its green objectives.
  • Reliable Support: Our experienced team is on hand to guide you from product selection to final delivery.

Safety & Warranty

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, reducing the likelihood of students tipping backwards during class.
  • Compliance with BS EN1729 Part 1 ensures the 430mm seat height is ergonomically correct for the 11-14 age group, supporting rapid growth spurts.
  • The Snag-Free Construction removes all nuts and screws, creating a seamless surface that eliminates the risk of scratches or caught blazers.
  • A Reinforced Undercarriage adds significant structural strength, ensuring the chair can withstand the wear and tear of a busy secondary environment.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and plastic shell, providing total peace of mind for business managers.

Specification Dimensions

The Size 5 Blue Reinforced Chair combines certified ergonomic support with secondary school safety engineering. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3.

Age Group
11-14 Years (Size 5)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7, 8 & 9
Total Dimensions
430mm(H) x 394mm(W) x 400mm(D)
Scaled profile for secondary pupils
Leg Finish
Grey Metal
Durable and neutral
Construction
Reinforced Undercarriage
Enhanced structural life
Safety Feature
No Nuts or Screws
Anti-tamper and snag-free
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports eco-friendly targets
Compliance
BS EN1729 Parts 1 & 2
Certified for education use
Origin
Manufactured in UK
Quality assurance

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 20 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: The UK’s Leading School Seating Solutions

Q: Is "Size 5" the correct choice for my students?

A: Yes. Size 5 is the industry standard for students aged 11 to 14 years, typically in Years 7, 8, and 9. With a seat height of 430mm, it allows pupils to sit with feet flat on the floor, which is vital for comfort and posture during the early secondary years.

Q: Why is the "no nuts or screws" design beneficial?

A: In a busy academy setting, safety and durability are key. By removing external fixings, we eliminate the risk of students tampering with parts or snagging their blazers on sharp edges, creating a smoother, safer chair that requires less maintenance.

Q: Can I stack these chairs 10 high safely?

A: Absolutely. This reinforced model is specifically engineered to stack stably up to 10 units high, making it incredibly easy to clear classrooms for drama or dining halls for cleaning.

Q: Does this chair comply with BS EN1729?

A: Yes. It is fully compliant with BS EN1729 Parts 1 & 2. Part 1 covers the ergonomic dimensions required for healthy spinal development, while Part 2 certifies the structural strength for institutional use.

Q: What is the purpose of the "colour coded feet"?

A: The feet are coloured to correspond with the "Size 5" specification. This allows staff to instantly identify the correct furniture for the 11-14 year age group, preventing mix-ups in schools with multiple key stages.

Q: How durable is the "reinforced undercarriage"?

A: It is designed for exceptional longevity. The extra steel reinforcement under the seat ensures the chair can withstand the high-impact use of secondary students far better than standard plastic chairs, backed by our 15-year warranty.

Q: Is the Blue plastic easy to clean?

A: Yes. The shell is durable and non-porous. It can be wiped down easily with a non-abrasive cleaner and a warm damp cloth, making it simple to maintain hygiene standards after art lessons or lunch.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, a market-leading 15-year warranty, and expert advice to ensure your procurement process is effortless.

Blue Reinforced Ergonomic School Chair - Size 5 - 11-14 Years - Grey Legs

Product code: CH15BL
Support the academic journey through Key Stage 3 with the Cobolt Blue Reinforced Ergonomic Chair (Size 5 / 11-14 Years). Engineered to accommodate the...

Inc VAT

Exc VAT

£46.00

£38.33

Height by Age - 11-14 Years
Colours - Blue

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Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Blue Reinforced Secondary Chair

The Cobolt Blue Reinforced Chair is built to withstand the rigorous routine of the secondary school day. Shipped with Free UK Mainland Delivery, it is designed to survive the "KS3 challenge"—heavier student use, constant classroom changes, and the high-traffic environment of an academy.

The Cobolt Advantage

  • Budget Security: Our comprehensive 15-year guarantee acts as a financial shield, ensuring your furniture expenditure delivers value well into the next decade.
  • Venue Adaptability: Unlike bulky alternative options, this model stacks securely up to 10 high, allowing exam halls and drama studios to be cleared in minutes.
  • Instant Recognition: The feet are fitted with colour-coded caps corresponding to the Size 5 specification, enabling site managers to instantly sort furniture by year group.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Precision-scaled for the 11-14 demographic (Size 5), the shell supports the spine to prevent slouching during intense study periods.
  • Circular Economy: The chair is designed for full recyclability, easily separating into wood, metal, and plastic components to support your school's green initiatives.
  • Focused Comfort: The moulded backrest provides essential lumbar reinforcement, helping secondary students maintain concentration during double periods.

Tamper-Free Construction

Student safety is non-negotiable. We employ a unique "no nuts or screws" assembly technique, removing small parts and sharp edges to create a completely secure and snag-proof unit.

The Cobolt Standard

  • 50 Years of Heritage: We have spent five decades supplying the UK education sector, ensuring our products consistently meet the strictest safety and quality standards.
  • Free UK Mainland Delivery: We manage all logistics at no extra cost, providing a simple, transparent, and budget-friendly procurement experience.
  • Project Support: Our UK-based team is on hand to assist with secondary school refits, ensuring your furniture arrives exactly as planned.

Where is this Size 5 Anti-Tilt Chair used?

The Blue Reinforced Secondary Chair is the standard specification for Year 7, 8 and 9 Classrooms, Science Labs, School Dining Halls, and Exam Halls. Its reinforced build and specific dimensions (Size 5) make it the ideal solution for students aged 11 to 14.

Key Features

  • Anti-Tilt Geometry – Stable base prevents tipping accidents during active lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for growing teenagers.
  • Size 5 (11-14 Years) – Ergonomically fit for Key Stage 3 pupils.
  • 15-Year Warranty – Extensive cover for the frame and shell structure.
  • Smooth Profile – No exposed screws or nuts to catch clothing or fingers.
  • Stackable 10-High – Maximises floor space efficiency in multi-use areas.
  • Colour-Coded Feet – Simplifies size identification for staff.
  • UK Manufactured – High-quality British production with a low carbon footprint.
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 understand the unique safety and durability requirements of secondary school furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to help your school make the most of its budget.
  • Sustainability Partners: Fully recyclable materials help your institution achieve its green objectives.
  • Reliable Support: Our experienced team is on hand to guide you from product selection to final delivery.

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, reducing the likelihood of students tipping backwards during class.
  • Compliance with BS EN1729 Part 1 ensures the 430mm seat height is ergonomically correct for the 11-14 age group, supporting rapid growth spurts.
  • The Snag-Free Construction removes all nuts and screws, creating a seamless surface that eliminates the risk of scratches or caught blazers.
  • A Reinforced Undercarriage adds significant structural strength, ensuring the chair can withstand the wear and tear of a busy secondary environment.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and plastic shell, providing total peace of mind for business managers.

The Size 5 Blue Reinforced Chair combines certified ergonomic support with secondary school safety engineering. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3.

Age Group
11-14 Years (Size 5)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7, 8 & 9
Total Dimensions
430mm(H) x 394mm(W) x 400mm(D)
Scaled profile for secondary pupils
Leg Finish
Grey Metal
Durable and neutral
Construction
Reinforced Undercarriage
Enhanced structural life
Safety Feature
No Nuts or Screws
Anti-tamper and snag-free
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports eco-friendly targets
Compliance
BS EN1729 Parts 1 & 2
Certified for education use
Origin
Manufactured in UK
Quality assurance

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 20 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: The UK’s Leading School Seating Solutions

Q: Is "Size 5" the correct choice for my students?

A: Yes. Size 5 is the industry standard for students aged 11 to 14 years, typically in Years 7, 8, and 9. With a seat height of 430mm, it allows pupils to sit with feet flat on the floor, which is vital for comfort and posture during the early secondary years.

Q: Why is the "no nuts or screws" design beneficial?

A: In a busy academy setting, safety and durability are key. By removing external fixings, we eliminate the risk of students tampering with parts or snagging their blazers on sharp edges, creating a smoother, safer chair that requires less maintenance.

Q: Can I stack these chairs 10 high safely?

A: Absolutely. This reinforced model is specifically engineered to stack stably up to 10 units high, making it incredibly easy to clear classrooms for drama or dining halls for cleaning.

Q: Does this chair comply with BS EN1729?

A: Yes. It is fully compliant with BS EN1729 Parts 1 & 2. Part 1 covers the ergonomic dimensions required for healthy spinal development, while Part 2 certifies the structural strength for institutional use.

Q: What is the purpose of the "colour coded feet"?

A: The feet are coloured to correspond with the "Size 5" specification. This allows staff to instantly identify the correct furniture for the 11-14 year age group, preventing mix-ups in schools with multiple key stages.

Q: How durable is the "reinforced undercarriage"?

A: It is designed for exceptional longevity. The extra steel reinforcement under the seat ensures the chair can withstand the high-impact use of secondary students far better than standard plastic chairs, backed by our 15-year warranty.

Q: Is the Blue plastic easy to clean?

A: Yes. The shell is durable and non-porous. It can be wiped down easily with a non-abrasive cleaner and a warm damp cloth, making it simple to maintain hygiene standards after art lessons or lunch.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, a market-leading 15-year warranty, and expert advice to ensure your procurement process is effortless.

Overview

Product Overview: Size 5 Blue Reinforced Secondary Chair

The Cobolt Blue Reinforced Chair is built to withstand the rigorous routine of the secondary school day. Shipped with Free UK Mainland Delivery, it is designed to survive the "KS3 challenge"—heavier student use, constant classroom changes, and the high-traffic environment of an academy.

The Cobolt Advantage

  • Budget Security: Our comprehensive 15-year guarantee acts as a financial shield, ensuring your furniture expenditure delivers value well into the next decade.
  • Venue Adaptability: Unlike bulky alternative options, this model stacks securely up to 10 high, allowing exam halls and drama studios to be cleared in minutes.
  • Instant Recognition: The feet are fitted with colour-coded caps corresponding to the Size 5 specification, enabling site managers to instantly sort furniture by year group.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Precision-scaled for the 11-14 demographic (Size 5), the shell supports the spine to prevent slouching during intense study periods.
  • Circular Economy: The chair is designed for full recyclability, easily separating into wood, metal, and plastic components to support your school's green initiatives.
  • Focused Comfort: The moulded backrest provides essential lumbar reinforcement, helping secondary students maintain concentration during double periods.

Tamper-Free Construction

Student safety is non-negotiable. We employ a unique "no nuts or screws" assembly technique, removing small parts and sharp edges to create a completely secure and snag-proof unit.

The Cobolt Standard

  • 50 Years of Heritage: We have spent five decades supplying the UK education sector, ensuring our products consistently meet the strictest safety and quality standards.
  • Free UK Mainland Delivery: We manage all logistics at no extra cost, providing a simple, transparent, and budget-friendly procurement experience.
  • Project Support: Our UK-based team is on hand to assist with secondary school refits, ensuring your furniture arrives exactly as planned.

Features & Benefits

Where is this Size 5 Anti-Tilt Chair used?

The Blue Reinforced Secondary Chair is the standard specification for Year 7, 8 and 9 Classrooms, Science Labs, School Dining Halls, and Exam Halls. Its reinforced build and specific dimensions (Size 5) make it the ideal solution for students aged 11 to 14.

Key Features

  • Anti-Tilt Geometry – Stable base prevents tipping accidents during active lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for growing teenagers.
  • Size 5 (11-14 Years) – Ergonomically fit for Key Stage 3 pupils.
  • 15-Year Warranty – Extensive cover for the frame and shell structure.
  • Smooth Profile – No exposed screws or nuts to catch clothing or fingers.
  • Stackable 10-High – Maximises floor space efficiency in multi-use areas.
  • Colour-Coded Feet – Simplifies size identification for staff.
  • UK Manufactured – High-quality British production with a low carbon footprint.
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 understand the unique safety and durability requirements of secondary school furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to help your school make the most of its budget.
  • Sustainability Partners: Fully recyclable materials help your institution achieve its green objectives.
  • Reliable Support: Our experienced team is on hand to guide you from product selection to final delivery.

Safety & Warranty

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, reducing the likelihood of students tipping backwards during class.
  • Compliance with BS EN1729 Part 1 ensures the 430mm seat height is ergonomically correct for the 11-14 age group, supporting rapid growth spurts.
  • The Snag-Free Construction removes all nuts and screws, creating a seamless surface that eliminates the risk of scratches or caught blazers.
  • A Reinforced Undercarriage adds significant structural strength, ensuring the chair can withstand the wear and tear of a busy secondary environment.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and plastic shell, providing total peace of mind for business managers.

Specification Dimensions

The Size 5 Blue Reinforced Chair combines certified ergonomic support with secondary school safety engineering. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3.

Age Group
11-14 Years (Size 5)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Year 7, 8 & 9
Total Dimensions
430mm(H) x 394mm(W) x 400mm(D)
Scaled profile for secondary pupils
Leg Finish
Grey Metal
Durable and neutral
Construction
Reinforced Undercarriage
Enhanced structural life
Safety Feature
No Nuts or Screws
Anti-tamper and snag-free
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports eco-friendly targets
Compliance
BS EN1729 Parts 1 & 2
Certified for education use
Origin
Manufactured in UK
Quality assurance

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 20 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: The UK’s Leading School Seating Solutions

Q: Is "Size 5" the correct choice for my students?

A: Yes. Size 5 is the industry standard for students aged 11 to 14 years, typically in Years 7, 8, and 9. With a seat height of 430mm, it allows pupils to sit with feet flat on the floor, which is vital for comfort and posture during the early secondary years.

Q: Why is the "no nuts or screws" design beneficial?

A: In a busy academy setting, safety and durability are key. By removing external fixings, we eliminate the risk of students tampering with parts or snagging their blazers on sharp edges, creating a smoother, safer chair that requires less maintenance.

Q: Can I stack these chairs 10 high safely?

A: Absolutely. This reinforced model is specifically engineered to stack stably up to 10 units high, making it incredibly easy to clear classrooms for drama or dining halls for cleaning.

Q: Does this chair comply with BS EN1729?

A: Yes. It is fully compliant with BS EN1729 Parts 1 & 2. Part 1 covers the ergonomic dimensions required for healthy spinal development, while Part 2 certifies the structural strength for institutional use.

Q: What is the purpose of the "colour coded feet"?

A: The feet are coloured to correspond with the "Size 5" specification. This allows staff to instantly identify the correct furniture for the 11-14 year age group, preventing mix-ups in schools with multiple key stages.

Q: How durable is the "reinforced undercarriage"?

A: It is designed for exceptional longevity. The extra steel reinforcement under the seat ensures the chair can withstand the high-impact use of secondary students far better than standard plastic chairs, backed by our 15-year warranty.

Q: Is the Blue plastic easy to clean?

A: Yes. The shell is durable and non-porous. It can be wiped down easily with a non-abrasive cleaner and a warm damp cloth, making it simple to maintain hygiene standards after art lessons or lunch.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, a market-leading 15-year warranty, and expert advice to ensure your procurement process is effortless.

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