Purple plastic chair with triangular backrest cutout and ergonomic seat, suitable for student seating.
Purple plastic chair with integrated handle slot and contoured backrest, ideal for classroom environments.
Promotional graphic of purple chair with red inset and tags for BS EN1729 compliance, scratch resistance, UK manufacture, and ergonomic posture design.
Updated chair size chart showing age ranges, seat dimensions, and colour-coded foot indicators for nursery to adult use, with detailed popliteal and stature ranges.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Purple One-Piece Secondary Chair

The Cobolt Flora One-Piece range is the definitive choice for high-traffic secondary school settings. Dispatched with Free UK Mainland Delivery, this Size 5 model provides a maintenance-free, hygienic seating solution built to endure the rigours of Key Stage 3 education.

The One-Piece Advantage

  • Unrivalled Lifespan: Backed by an industry-leading 20-year manufacturer warranty, these chairs are designed to survive the high-impact daily use typical of secondary school environments.
  • Seamless Hygiene: The jointless construction leaves no crevices for dust or bacteria to accumulate, making it an ideal choice for school dining halls, science labs, and busy classrooms.
  • Total Safety: With zero nuts, bolts, or sharp metal edges, this chair is completely "tamper-proof," protecting students and ensuring no snagged school blazers or loose hardware.

Ergonomics & Sustainability

  • Posture Support: Specifically scaled for the 11-14 age demographic (Size 5), the shell encourages a natural seated position to aid concentration and spinal health during long lessons.
  • Eco-Responsible: FSC approved and 100% recyclable. At the end of its extensive service life, the chair can be fully recycled as a single material without disassembly.
  • Staff Efficiency: Colour-coded anti-slip feet correspond to the Size 5 standard, allowing site teams to instantly identify and organise secondary-height furniture.

Heavy Duty Engineering

Designed for the demands of secondary education, this chair combines a robust profile (3.7kg) for stability with an extra-strong undercarriage for maximum durability. The single-mould process ensures there are no weak points at the joints, where traditional metal-framed chairs often fail under the weight of growing teenagers.

The Cobolt Standard

  • 50 Years of Expertise: We have spent five decades supplying the UK public sector, ensuring every chair meets the highest benchmarks for safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no additional cost, providing a budget-friendly experience for your academy.
  • UK Designed: Engineered specifically for the demands of the British educational environment.

Where is this Size 5 One-Piece Chair used?

The Purple One-Piece Secondary Chair is a popular specification for Key Stage 3 Classrooms, Secondary ICT Suites, Science Laboratories, and Academy Dining Halls. Its robust, waterproof design makes it a versatile asset for both curriculum and communal areas.

Key Features

  • One-Piece Moulded Design – Zero joints or screws for maximum structural integrity.
  • 20-Year Warranty – Our most extensive guarantee for long-term peace of mind.
  • Size 5 (11-14 Years) – Correct ergonomic scaling for secondary students.
  • High Impact Resistance – Built to withstand the weight and activity of growing teenagers.
  • Jointless Construction – Anti-tamper and exceptionally easy to deep-clean.
  • Stackable 10-High – Maximises floor space efficiency in exam halls and classrooms.
  • Anti-Slip Feet – Colour-coded for easy age-group identification.
  • BS EN1729 Compliant – Tested to the highest standards for strength and stability.
20 Year Warranty icon
20-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
Recyclable icon
100% Responsibly Recyclable

Safety Engineered. Maintenance Free.

  • The Integrated One-Piece Design is the safest architectural choice for schools, as it eliminates the screws, bolts, and metal edges found in traditional chairs.
  • A Reinforced Undercarriage provides enhanced structural lifespan, ensuring the chair can withstand the increased weight requirements of Key Stage 3 pupils.
  • Compliance with BS EN1729 Parts 1 & 2 guarantees that the chair meets strict UK standards for stability, strength, and ergonomic sizing.
  • The 20-Year Manufacturer Warranty is an industry-leading commitment, ensuring your school’s investment is protected for two decades of service.
  • Anti-Slip Feet are fitted to every leg, providing essential grip on various floor surfaces and preventing the chair from sliding during active use.

The Size 5 Purple One-Piece Chair combines indestructible construction with certified ergonomic support. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Weight
3.7kg
Guarantee
20 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Total Dimensions
790mm(H) x 455mm(W) x 510mm(D)
Secondary-specific profile
Construction
Single-Mould Polypropylene
No joints, rust-proof, easy clean
Stacking Ability
Up to 10 High
Space-saving storage
Compliance
BS EN1729 Parts 1 & 2
Certified for education use

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 10 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 Toughest School Chairs

Q: Is "Size 5" the correct choice for Years 7, 8, and 9?

A: Yes. Size 5 is the industry standard for children aged 11 to 14 years. With a 430mm seat height, it is specifically designed to support Key Stage 3 pupils as they transition into adult-sized furniture.

Q: Why is jointless construction better for secondary academies?

A: Secondary environments involve higher usage and weight loads. Jointless chairs have no stress points like welds or screws that can fail, and they are immune to students attempting to disassemble or loosen hardware.

Q: Are these chairs easy to sanitise between different classes?

A: Absolutely. They are 100% waterproof and have zero crevices where germs or bacteria can hide. They can be wiped down quickly between lesson changeovers with standard non-abrasive cleaners.

Q: What does the 20-year warranty actually cover?

A: The warranty covers structural defects and ensures the chair remains fit for purpose in a school environment. This single-mould design is built to outlive metal-framed alternatives by a significant margin.

Q: Can these chairs be used in science labs or ICT suites?

A: Yes. Their robust construction and ergonomic support make them ideal for any classroom setting. The high-grade polypropylene is resistant to most common classroom spills and chemical splashes.

Q: How many chairs can be safely stacked for venue clearing?

A: These secondary chairs are designed for high-density nesting. You can safely stack them up to 10 units high, making them easy to move or store efficiently during exams or hall events.

Q: Are these chairs environmentally sustainable?

A: Yes. They are FSC approved and 100% responsibly recyclable. Because they consist of a single material, they are significantly easier to recycle at end-of-life than chairs with composite parts.

Q: Why should we buy our secondary seating from Cobolt?

A: With over 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert advice, and British-standard quality that stands the test of time.

Overview

Product Overview: Size 5 Purple One-Piece Secondary Chair

The Cobolt Flora One-Piece range is the definitive choice for high-traffic secondary school settings. Dispatched with Free UK Mainland Delivery, this Size 5 model provides a maintenance-free, hygienic seating solution built to endure the rigours of Key Stage 3 education.

The One-Piece Advantage

  • Unrivalled Lifespan: Backed by an industry-leading 20-year manufacturer warranty, these chairs are designed to survive the high-impact daily use typical of secondary school environments.
  • Seamless Hygiene: The jointless construction leaves no crevices for dust or bacteria to accumulate, making it an ideal choice for school dining halls, science labs, and busy classrooms.
  • Total Safety: With zero nuts, bolts, or sharp metal edges, this chair is completely "tamper-proof," protecting students and ensuring no snagged school blazers or loose hardware.

Ergonomics & Sustainability

  • Posture Support: Specifically scaled for the 11-14 age demographic (Size 5), the shell encourages a natural seated position to aid concentration and spinal health during long lessons.
  • Eco-Responsible: FSC approved and 100% recyclable. At the end of its extensive service life, the chair can be fully recycled as a single material without disassembly.
  • Staff Efficiency: Colour-coded anti-slip feet correspond to the Size 5 standard, allowing site teams to instantly identify and organise secondary-height furniture.

Heavy Duty Engineering

Designed for the demands of secondary education, this chair combines a robust profile (3.7kg) for stability with an extra-strong undercarriage for maximum durability. The single-mould process ensures there are no weak points at the joints, where traditional metal-framed chairs often fail under the weight of growing teenagers.

The Cobolt Standard

  • 50 Years of Expertise: We have spent five decades supplying the UK public sector, ensuring every chair meets the highest benchmarks for safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no additional cost, providing a budget-friendly experience for your academy.
  • UK Designed: Engineered specifically for the demands of the British educational environment.

Features & Benefits

Where is this Size 5 One-Piece Chair used?

The Purple One-Piece Secondary Chair is a popular specification for Key Stage 3 Classrooms, Secondary ICT Suites, Science Laboratories, and Academy Dining Halls. Its robust, waterproof design makes it a versatile asset for both curriculum and communal areas.

Key Features

  • One-Piece Moulded Design – Zero joints or screws for maximum structural integrity.
  • 20-Year Warranty – Our most extensive guarantee for long-term peace of mind.
  • Size 5 (11-14 Years) – Correct ergonomic scaling for secondary students.
  • High Impact Resistance – Built to withstand the weight and activity of growing teenagers.
  • Jointless Construction – Anti-tamper and exceptionally easy to deep-clean.
  • Stackable 10-High – Maximises floor space efficiency in exam halls and classrooms.
  • Anti-Slip Feet – Colour-coded for easy age-group identification.
  • BS EN1729 Compliant – Tested to the highest standards for strength and stability.
20 Year Warranty icon
20-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
Recyclable icon
100% Responsibly Recyclable

Safety & Warranty

Safety Engineered. Maintenance Free.

  • The Integrated One-Piece Design is the safest architectural choice for schools, as it eliminates the screws, bolts, and metal edges found in traditional chairs.
  • A Reinforced Undercarriage provides enhanced structural lifespan, ensuring the chair can withstand the increased weight requirements of Key Stage 3 pupils.
  • Compliance with BS EN1729 Parts 1 & 2 guarantees that the chair meets strict UK standards for stability, strength, and ergonomic sizing.
  • The 20-Year Manufacturer Warranty is an industry-leading commitment, ensuring your school’s investment is protected for two decades of service.
  • Anti-Slip Feet are fitted to every leg, providing essential grip on various floor surfaces and preventing the chair from sliding during active use.

Specification Dimensions

The Size 5 Purple One-Piece Chair combines indestructible construction with certified ergonomic support. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Weight
3.7kg
Guarantee
20 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Total Dimensions
790mm(H) x 455mm(W) x 510mm(D)
Secondary-specific profile
Construction
Single-Mould Polypropylene
No joints, rust-proof, easy clean
Stacking Ability
Up to 10 High
Space-saving storage
Compliance
BS EN1729 Parts 1 & 2
Certified for education use

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 10 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 Toughest School Chairs

Q: Is "Size 5" the correct choice for Years 7, 8, and 9?

A: Yes. Size 5 is the industry standard for children aged 11 to 14 years. With a 430mm seat height, it is specifically designed to support Key Stage 3 pupils as they transition into adult-sized furniture.

Q: Why is jointless construction better for secondary academies?

A: Secondary environments involve higher usage and weight loads. Jointless chairs have no stress points like welds or screws that can fail, and they are immune to students attempting to disassemble or loosen hardware.

Q: Are these chairs easy to sanitise between different classes?

A: Absolutely. They are 100% waterproof and have zero crevices where germs or bacteria can hide. They can be wiped down quickly between lesson changeovers with standard non-abrasive cleaners.

Q: What does the 20-year warranty actually cover?

A: The warranty covers structural defects and ensures the chair remains fit for purpose in a school environment. This single-mould design is built to outlive metal-framed alternatives by a significant margin.

Q: Can these chairs be used in science labs or ICT suites?

A: Yes. Their robust construction and ergonomic support make them ideal for any classroom setting. The high-grade polypropylene is resistant to most common classroom spills and chemical splashes.

Q: How many chairs can be safely stacked for venue clearing?

A: These secondary chairs are designed for high-density nesting. You can safely stack them up to 10 units high, making them easy to move or store efficiently during exams or hall events.

Q: Are these chairs environmentally sustainable?

A: Yes. They are FSC approved and 100% responsibly recyclable. Because they consist of a single material, they are significantly easier to recycle at end-of-life than chairs with composite parts.

Q: Why should we buy our secondary seating from Cobolt?

A: With over 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert advice, and British-standard quality that stands the test of time.

Purple One-Piece Heavy Duty School Chair - Size 5 - 11-14 Years

Product code: CH25PU
Modernise your secondary school environment with the Cobolt Purple One-Piece Heavy Duty School Chair (Size 5 / 11-14 Years). Specifically engineered f...

Inc VAT

Exc VAT

£28.00

£23.33

Height by Age - 11-14 Years
Colours - Purple

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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 Purple One-Piece Secondary Chair

The Cobolt Flora One-Piece range is the definitive choice for high-traffic secondary school settings. Dispatched with Free UK Mainland Delivery, this Size 5 model provides a maintenance-free, hygienic seating solution built to endure the rigours of Key Stage 3 education.

The One-Piece Advantage

  • Unrivalled Lifespan: Backed by an industry-leading 20-year manufacturer warranty, these chairs are designed to survive the high-impact daily use typical of secondary school environments.
  • Seamless Hygiene: The jointless construction leaves no crevices for dust or bacteria to accumulate, making it an ideal choice for school dining halls, science labs, and busy classrooms.
  • Total Safety: With zero nuts, bolts, or sharp metal edges, this chair is completely "tamper-proof," protecting students and ensuring no snagged school blazers or loose hardware.

Ergonomics & Sustainability

  • Posture Support: Specifically scaled for the 11-14 age demographic (Size 5), the shell encourages a natural seated position to aid concentration and spinal health during long lessons.
  • Eco-Responsible: FSC approved and 100% recyclable. At the end of its extensive service life, the chair can be fully recycled as a single material without disassembly.
  • Staff Efficiency: Colour-coded anti-slip feet correspond to the Size 5 standard, allowing site teams to instantly identify and organise secondary-height furniture.

Heavy Duty Engineering

Designed for the demands of secondary education, this chair combines a robust profile (3.7kg) for stability with an extra-strong undercarriage for maximum durability. The single-mould process ensures there are no weak points at the joints, where traditional metal-framed chairs often fail under the weight of growing teenagers.

The Cobolt Standard

  • 50 Years of Expertise: We have spent five decades supplying the UK public sector, ensuring every chair meets the highest benchmarks for safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no additional cost, providing a budget-friendly experience for your academy.
  • UK Designed: Engineered specifically for the demands of the British educational environment.

Where is this Size 5 One-Piece Chair used?

The Purple One-Piece Secondary Chair is a popular specification for Key Stage 3 Classrooms, Secondary ICT Suites, Science Laboratories, and Academy Dining Halls. Its robust, waterproof design makes it a versatile asset for both curriculum and communal areas.

Key Features

  • One-Piece Moulded Design – Zero joints or screws for maximum structural integrity.
  • 20-Year Warranty – Our most extensive guarantee for long-term peace of mind.
  • Size 5 (11-14 Years) – Correct ergonomic scaling for secondary students.
  • High Impact Resistance – Built to withstand the weight and activity of growing teenagers.
  • Jointless Construction – Anti-tamper and exceptionally easy to deep-clean.
  • Stackable 10-High – Maximises floor space efficiency in exam halls and classrooms.
  • Anti-Slip Feet – Colour-coded for easy age-group identification.
  • BS EN1729 Compliant – Tested to the highest standards for strength and stability.
20 Year Warranty icon
20-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
Recyclable icon
100% Responsibly Recyclable

Safety Engineered. Maintenance Free.

  • The Integrated One-Piece Design is the safest architectural choice for schools, as it eliminates the screws, bolts, and metal edges found in traditional chairs.
  • A Reinforced Undercarriage provides enhanced structural lifespan, ensuring the chair can withstand the increased weight requirements of Key Stage 3 pupils.
  • Compliance with BS EN1729 Parts 1 & 2 guarantees that the chair meets strict UK standards for stability, strength, and ergonomic sizing.
  • The 20-Year Manufacturer Warranty is an industry-leading commitment, ensuring your school’s investment is protected for two decades of service.
  • Anti-Slip Feet are fitted to every leg, providing essential grip on various floor surfaces and preventing the chair from sliding during active use.

The Size 5 Purple One-Piece Chair combines indestructible construction with certified ergonomic support. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Weight
3.7kg
Guarantee
20 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Total Dimensions
790mm(H) x 455mm(W) x 510mm(D)
Secondary-specific profile
Construction
Single-Mould Polypropylene
No joints, rust-proof, easy clean
Stacking Ability
Up to 10 High
Space-saving storage
Compliance
BS EN1729 Parts 1 & 2
Certified for education use

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 10 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 Toughest School Chairs

Q: Is "Size 5" the correct choice for Years 7, 8, and 9?

A: Yes. Size 5 is the industry standard for children aged 11 to 14 years. With a 430mm seat height, it is specifically designed to support Key Stage 3 pupils as they transition into adult-sized furniture.

Q: Why is jointless construction better for secondary academies?

A: Secondary environments involve higher usage and weight loads. Jointless chairs have no stress points like welds or screws that can fail, and they are immune to students attempting to disassemble or loosen hardware.

Q: Are these chairs easy to sanitise between different classes?

A: Absolutely. They are 100% waterproof and have zero crevices where germs or bacteria can hide. They can be wiped down quickly between lesson changeovers with standard non-abrasive cleaners.

Q: What does the 20-year warranty actually cover?

A: The warranty covers structural defects and ensures the chair remains fit for purpose in a school environment. This single-mould design is built to outlive metal-framed alternatives by a significant margin.

Q: Can these chairs be used in science labs or ICT suites?

A: Yes. Their robust construction and ergonomic support make them ideal for any classroom setting. The high-grade polypropylene is resistant to most common classroom spills and chemical splashes.

Q: How many chairs can be safely stacked for venue clearing?

A: These secondary chairs are designed for high-density nesting. You can safely stack them up to 10 units high, making them easy to move or store efficiently during exams or hall events.

Q: Are these chairs environmentally sustainable?

A: Yes. They are FSC approved and 100% responsibly recyclable. Because they consist of a single material, they are significantly easier to recycle at end-of-life than chairs with composite parts.

Q: Why should we buy our secondary seating from Cobolt?

A: With over 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert advice, and British-standard quality that stands the test of time.

Overview

Product Overview: Size 5 Purple One-Piece Secondary Chair

The Cobolt Flora One-Piece range is the definitive choice for high-traffic secondary school settings. Dispatched with Free UK Mainland Delivery, this Size 5 model provides a maintenance-free, hygienic seating solution built to endure the rigours of Key Stage 3 education.

The One-Piece Advantage

  • Unrivalled Lifespan: Backed by an industry-leading 20-year manufacturer warranty, these chairs are designed to survive the high-impact daily use typical of secondary school environments.
  • Seamless Hygiene: The jointless construction leaves no crevices for dust or bacteria to accumulate, making it an ideal choice for school dining halls, science labs, and busy classrooms.
  • Total Safety: With zero nuts, bolts, or sharp metal edges, this chair is completely "tamper-proof," protecting students and ensuring no snagged school blazers or loose hardware.

Ergonomics & Sustainability

  • Posture Support: Specifically scaled for the 11-14 age demographic (Size 5), the shell encourages a natural seated position to aid concentration and spinal health during long lessons.
  • Eco-Responsible: FSC approved and 100% recyclable. At the end of its extensive service life, the chair can be fully recycled as a single material without disassembly.
  • Staff Efficiency: Colour-coded anti-slip feet correspond to the Size 5 standard, allowing site teams to instantly identify and organise secondary-height furniture.

Heavy Duty Engineering

Designed for the demands of secondary education, this chair combines a robust profile (3.7kg) for stability with an extra-strong undercarriage for maximum durability. The single-mould process ensures there are no weak points at the joints, where traditional metal-framed chairs often fail under the weight of growing teenagers.

The Cobolt Standard

  • 50 Years of Expertise: We have spent five decades supplying the UK public sector, ensuring every chair meets the highest benchmarks for safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no additional cost, providing a budget-friendly experience for your academy.
  • UK Designed: Engineered specifically for the demands of the British educational environment.

Features & Benefits

Where is this Size 5 One-Piece Chair used?

The Purple One-Piece Secondary Chair is a popular specification for Key Stage 3 Classrooms, Secondary ICT Suites, Science Laboratories, and Academy Dining Halls. Its robust, waterproof design makes it a versatile asset for both curriculum and communal areas.

Key Features

  • One-Piece Moulded Design – Zero joints or screws for maximum structural integrity.
  • 20-Year Warranty – Our most extensive guarantee for long-term peace of mind.
  • Size 5 (11-14 Years) – Correct ergonomic scaling for secondary students.
  • High Impact Resistance – Built to withstand the weight and activity of growing teenagers.
  • Jointless Construction – Anti-tamper and exceptionally easy to deep-clean.
  • Stackable 10-High – Maximises floor space efficiency in exam halls and classrooms.
  • Anti-Slip Feet – Colour-coded for easy age-group identification.
  • BS EN1729 Compliant – Tested to the highest standards for strength and stability.
20 Year Warranty icon
20-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
Recyclable icon
100% Responsibly Recyclable

Safety & Warranty

Safety Engineered. Maintenance Free.

  • The Integrated One-Piece Design is the safest architectural choice for schools, as it eliminates the screws, bolts, and metal edges found in traditional chairs.
  • A Reinforced Undercarriage provides enhanced structural lifespan, ensuring the chair can withstand the increased weight requirements of Key Stage 3 pupils.
  • Compliance with BS EN1729 Parts 1 & 2 guarantees that the chair meets strict UK standards for stability, strength, and ergonomic sizing.
  • The 20-Year Manufacturer Warranty is an industry-leading commitment, ensuring your school’s investment is protected for two decades of service.
  • Anti-Slip Feet are fitted to every leg, providing essential grip on various floor surfaces and preventing the chair from sliding during active use.

Specification Dimensions

The Size 5 Purple One-Piece Chair combines indestructible construction with certified ergonomic support. These specifications detail the materials and dimensions that make it the responsible choice for secondary education.

Age Group
11-14 Years (Size 5)
Weight
3.7kg
Guarantee
20 Years
Specification
Details
Purpose / Benefit
Seat Height
430mm
Standard Size 5 for Key Stage 3
Total Dimensions
790mm(H) x 455mm(W) x 510mm(D)
Secondary-specific profile
Construction
Single-Mould Polypropylene
No joints, rust-proof, easy clean
Stacking Ability
Up to 10 High
Space-saving storage
Compliance
BS EN1729 Parts 1 & 2
Certified for education use

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 10 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 Toughest School Chairs

Q: Is "Size 5" the correct choice for Years 7, 8, and 9?

A: Yes. Size 5 is the industry standard for children aged 11 to 14 years. With a 430mm seat height, it is specifically designed to support Key Stage 3 pupils as they transition into adult-sized furniture.

Q: Why is jointless construction better for secondary academies?

A: Secondary environments involve higher usage and weight loads. Jointless chairs have no stress points like welds or screws that can fail, and they are immune to students attempting to disassemble or loosen hardware.

Q: Are these chairs easy to sanitise between different classes?

A: Absolutely. They are 100% waterproof and have zero crevices where germs or bacteria can hide. They can be wiped down quickly between lesson changeovers with standard non-abrasive cleaners.

Q: What does the 20-year warranty actually cover?

A: The warranty covers structural defects and ensures the chair remains fit for purpose in a school environment. This single-mould design is built to outlive metal-framed alternatives by a significant margin.

Q: Can these chairs be used in science labs or ICT suites?

A: Yes. Their robust construction and ergonomic support make them ideal for any classroom setting. The high-grade polypropylene is resistant to most common classroom spills and chemical splashes.

Q: How many chairs can be safely stacked for venue clearing?

A: These secondary chairs are designed for high-density nesting. You can safely stack them up to 10 units high, making them easy to move or store efficiently during exams or hall events.

Q: Are these chairs environmentally sustainable?

A: Yes. They are FSC approved and 100% responsibly recyclable. Because they consist of a single material, they are significantly easier to recycle at end-of-life than chairs with composite parts.

Q: Why should we buy our secondary seating from Cobolt?

A: With over 50 years of heritage, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert advice, and British-standard quality that stands the test of time.

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