Grey plastic chair with silver metal legs and cutout backrest, built for institutional durability and comfort.
Grey plastic chair with silver metal legs and rectangular backrest cutout, designed for stacking and institutional use.
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 4 Dark Grey Reinforced Senior Primary Chair

The Cobolt Dark Grey Reinforced Chair is the standard-setter for modern senior primary interiors. Delivered with Free UK Mainland Delivery, it is built to survive the "Upper KS2 routine"—heavy usage, daily room rearranging, and the specific ergonomic needs of 8-to-11-year-olds.

The Cobolt Advantage

  • Financial Assurance: Our industry-leading 15-year guarantee protects your capital investment, ensuring these chairs serve multiple cohorts of pupils throughout their senior primary journey.
  • Floor Space Flexibility: Designed for multi-use halls, these units stack securely up to 10 high, allowing for rapid room clearance during lunch, drama, or assembly.
  • Visual Sorting: Colour-coded anti-slip feet correspond to the Size 4 standard, enabling staff to instantly identify and organise senior-height furniture at a glance.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Specifically dimensioned for the 8-11 demographic (Size 4), the shell encourages natural spinal alignment during essential desk-based learning and exams.
  • Recyclable Engineering: Designed for a circular economy, the chair can be fully disassembled into its core components for responsible local recycling at end-of-life.
  • Pupil Comfort: The anatomically contoured backrest provides vital lumbar support, helping students stay focused and comfortable during longer lessons.

Anti-Tamper Construction

We prioritise classroom safety. By excluding all nuts and screws from the exterior assembly, we have created a smooth, tamper-proof profile that removes the risk of fixings being loosened or clothing being caught.

The Cobolt Standard

  • 50 Years of Expertise: We have spent half a century supplying the UK public sector, ensuring every chair meets the highest benchmarks for durability and student safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no extra cost, providing a transparent, budget-friendly procurement experience.
  • Education Specialists: Our UK-based team offers dedicated support for classroom refits and bulk order scheduling for primary and middle schools.

Where is this Size 4 Anti-Tilt Chair used?

The Dark Grey Reinforced Senior Primary Chair is a popular specification for Year 5 & Year 6 Classrooms, Primary IT Suites, School Dining Halls, and After-School Clubs. Its modern colour and specific dimensions (Size 4) make it a versatile asset for senior primary and middle school providers.

Key Features

  • Anti-Tilt Geometry – Stable base design prevents dangerous backward tipping during lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for long-term institutional use.
  • Size 4 (8-11 Years) – Correct ergonomic scaling for the senior primary stage.
  • 15-Year Warranty – Extensive cover for the structural frame and shell integrity.
  • No Nuts or Screws – Anti-tamper construction ensures a smooth, student-safe finish.
  • Stackable 10-High – Maximises floor space efficiency in busy classrooms.
  • Anti-Slip Feet – Colour-coded feet protect flooring and provide easy size identification.
  • UK Manufactured – High-quality British production with a minimal environmental 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 specific load-bearing and safety requirements of senior primary furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to ensure your school budget goes further.
  • Sustainability Partners: Fully recyclable materials help your institution meet its carbon reduction goals.
  • Reliable Support: Our experienced team provides expert guidance from product selection to final installation.

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, significantly reducing the risk of pupils tipping backwards during focused study.
  • Compliance with BS EN1729 Part 1 ensures the 380mm seat height is ergonomically suitable for the 8-11 age group, preventing back strain.
  • The Smooth-Finish Construction eliminates the need for nuts and screws, ensuring no sharp points can catch on school blazers or uniforms.
  • A Reinforced Undercarriage adds substantial structural support, ensuring the chair can withstand the increased weight requirements of Year 6 pupils.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and the high-impact shell, offering total peace of mind for business managers.

The Size 4 Dark Grey Reinforced Chair combines certified ergonomic support with senior primary safety engineering. These specifications detail the heavy-duty materials and dimensions that make it the responsible choice for schools.

Age Group
8-11 Years (Size 4)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
380mm
Standard Size 4 for Year 5 / Year 6
Total Dimensions
380mm(H) x 350mm(W) x 320mm(D)
Senior Primary profile
Leg Finish
Grey Metal
Durable and professional
Construction
Reinforced Undercarriage
Enhanced structural lifespan
Safety Feature
No Nuts or Screws
Anti-tamper and uniform safe
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports carbon reduction 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 4" the correct choice for Year 5 & 6 pupils?

A: Yes. Size 4 is the industry standard for children aged 8 to 11 years. With a seat height of 380mm, it allows senior primary students to sit with feet flat on the floor, which is vital for postural health and concentration as they prepare for secondary school.

Q: Why is the "no nuts or screws" design important for senior primary schools?

A: Safety and durability are paramount. By removing external fixings, we eliminate the risk of pupils loosening parts or tampering with the frame. It also ensures no sharp metal edges can catch on school blazers or jumpers.

Q: How many chairs can be stacked together 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 wet play or multi-purpose 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 posture, 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 4" specification. This allows staff to instantly identify the correct furniture for the 8-11 year age group, preventing mix-ups in schools with multiple year groups.

Q: Is the Dark Grey plastic easy to keep clean?

A: Yes. The high-grade polypropylene is non-porous and hides scuff marks well. It can be wiped down easily with a warm damp cloth and non-abrasive cleaner to maintain hygiene standards after messy art lessons or lunch.

Q: Are these chairs genuinely British made?

A: Yes. Every chair in this range is designed and manufactured in the UK. This ensures a low carbon footprint, superior quality control, and reliable availability for our UK-based customers.

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 efficient and reliable.

Overview

Product Overview: Size 4 Dark Grey Reinforced Senior Primary Chair

The Cobolt Dark Grey Reinforced Chair is the standard-setter for modern senior primary interiors. Delivered with Free UK Mainland Delivery, it is built to survive the "Upper KS2 routine"—heavy usage, daily room rearranging, and the specific ergonomic needs of 8-to-11-year-olds.

The Cobolt Advantage

  • Financial Assurance: Our industry-leading 15-year guarantee protects your capital investment, ensuring these chairs serve multiple cohorts of pupils throughout their senior primary journey.
  • Floor Space Flexibility: Designed for multi-use halls, these units stack securely up to 10 high, allowing for rapid room clearance during lunch, drama, or assembly.
  • Visual Sorting: Colour-coded anti-slip feet correspond to the Size 4 standard, enabling staff to instantly identify and organise senior-height furniture at a glance.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Specifically dimensioned for the 8-11 demographic (Size 4), the shell encourages natural spinal alignment during essential desk-based learning and exams.
  • Recyclable Engineering: Designed for a circular economy, the chair can be fully disassembled into its core components for responsible local recycling at end-of-life.
  • Pupil Comfort: The anatomically contoured backrest provides vital lumbar support, helping students stay focused and comfortable during longer lessons.

Anti-Tamper Construction

We prioritise classroom safety. By excluding all nuts and screws from the exterior assembly, we have created a smooth, tamper-proof profile that removes the risk of fixings being loosened or clothing being caught.

The Cobolt Standard

  • 50 Years of Expertise: We have spent half a century supplying the UK public sector, ensuring every chair meets the highest benchmarks for durability and student safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no extra cost, providing a transparent, budget-friendly procurement experience.
  • Education Specialists: Our UK-based team offers dedicated support for classroom refits and bulk order scheduling for primary and middle schools.

Features & Benefits

Where is this Size 4 Anti-Tilt Chair used?

The Dark Grey Reinforced Senior Primary Chair is a popular specification for Year 5 & Year 6 Classrooms, Primary IT Suites, School Dining Halls, and After-School Clubs. Its modern colour and specific dimensions (Size 4) make it a versatile asset for senior primary and middle school providers.

Key Features

  • Anti-Tilt Geometry – Stable base design prevents dangerous backward tipping during lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for long-term institutional use.
  • Size 4 (8-11 Years) – Correct ergonomic scaling for the senior primary stage.
  • 15-Year Warranty – Extensive cover for the structural frame and shell integrity.
  • No Nuts or Screws – Anti-tamper construction ensures a smooth, student-safe finish.
  • Stackable 10-High – Maximises floor space efficiency in busy classrooms.
  • Anti-Slip Feet – Colour-coded feet protect flooring and provide easy size identification.
  • UK Manufactured – High-quality British production with a minimal environmental 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 specific load-bearing and safety requirements of senior primary furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to ensure your school budget goes further.
  • Sustainability Partners: Fully recyclable materials help your institution meet its carbon reduction goals.
  • Reliable Support: Our experienced team provides expert guidance from product selection to final installation.

Safety & Warranty

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, significantly reducing the risk of pupils tipping backwards during focused study.
  • Compliance with BS EN1729 Part 1 ensures the 380mm seat height is ergonomically suitable for the 8-11 age group, preventing back strain.
  • The Smooth-Finish Construction eliminates the need for nuts and screws, ensuring no sharp points can catch on school blazers or uniforms.
  • A Reinforced Undercarriage adds substantial structural support, ensuring the chair can withstand the increased weight requirements of Year 6 pupils.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and the high-impact shell, offering total peace of mind for business managers.

Specification Dimensions

The Size 4 Dark Grey Reinforced Chair combines certified ergonomic support with senior primary safety engineering. These specifications detail the heavy-duty materials and dimensions that make it the responsible choice for schools.

Age Group
8-11 Years (Size 4)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
380mm
Standard Size 4 for Year 5 / Year 6
Total Dimensions
380mm(H) x 350mm(W) x 320mm(D)
Senior Primary profile
Leg Finish
Grey Metal
Durable and professional
Construction
Reinforced Undercarriage
Enhanced structural lifespan
Safety Feature
No Nuts or Screws
Anti-tamper and uniform safe
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports carbon reduction 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 4" the correct choice for Year 5 & 6 pupils?

A: Yes. Size 4 is the industry standard for children aged 8 to 11 years. With a seat height of 380mm, it allows senior primary students to sit with feet flat on the floor, which is vital for postural health and concentration as they prepare for secondary school.

Q: Why is the "no nuts or screws" design important for senior primary schools?

A: Safety and durability are paramount. By removing external fixings, we eliminate the risk of pupils loosening parts or tampering with the frame. It also ensures no sharp metal edges can catch on school blazers or jumpers.

Q: How many chairs can be stacked together 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 wet play or multi-purpose 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 posture, 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 4" specification. This allows staff to instantly identify the correct furniture for the 8-11 year age group, preventing mix-ups in schools with multiple year groups.

Q: Is the Dark Grey plastic easy to keep clean?

A: Yes. The high-grade polypropylene is non-porous and hides scuff marks well. It can be wiped down easily with a warm damp cloth and non-abrasive cleaner to maintain hygiene standards after messy art lessons or lunch.

Q: Are these chairs genuinely British made?

A: Yes. Every chair in this range is designed and manufactured in the UK. This ensures a low carbon footprint, superior quality control, and reliable availability for our UK-based customers.

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 efficient and reliable.

Dark Grey Reinforced Ergonomic School Chair - Size 4 - 8-11 Years - Grey Legs

Product code: CH14DG
Modernise your Upper Key Stage 2 learning environments with the Cobolt Dark Grey Reinforced Ergonomic Chair (Size 4 / 8-11 Years). This sophisticated ...

Inc VAT

Exc VAT

£37.00

£30.83

Height by Age - 8-11 Years
Colours - Grey

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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 4 Dark Grey Reinforced Senior Primary Chair

The Cobolt Dark Grey Reinforced Chair is the standard-setter for modern senior primary interiors. Delivered with Free UK Mainland Delivery, it is built to survive the "Upper KS2 routine"—heavy usage, daily room rearranging, and the specific ergonomic needs of 8-to-11-year-olds.

The Cobolt Advantage

  • Financial Assurance: Our industry-leading 15-year guarantee protects your capital investment, ensuring these chairs serve multiple cohorts of pupils throughout their senior primary journey.
  • Floor Space Flexibility: Designed for multi-use halls, these units stack securely up to 10 high, allowing for rapid room clearance during lunch, drama, or assembly.
  • Visual Sorting: Colour-coded anti-slip feet correspond to the Size 4 standard, enabling staff to instantly identify and organise senior-height furniture at a glance.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Specifically dimensioned for the 8-11 demographic (Size 4), the shell encourages natural spinal alignment during essential desk-based learning and exams.
  • Recyclable Engineering: Designed for a circular economy, the chair can be fully disassembled into its core components for responsible local recycling at end-of-life.
  • Pupil Comfort: The anatomically contoured backrest provides vital lumbar support, helping students stay focused and comfortable during longer lessons.

Anti-Tamper Construction

We prioritise classroom safety. By excluding all nuts and screws from the exterior assembly, we have created a smooth, tamper-proof profile that removes the risk of fixings being loosened or clothing being caught.

The Cobolt Standard

  • 50 Years of Expertise: We have spent half a century supplying the UK public sector, ensuring every chair meets the highest benchmarks for durability and student safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no extra cost, providing a transparent, budget-friendly procurement experience.
  • Education Specialists: Our UK-based team offers dedicated support for classroom refits and bulk order scheduling for primary and middle schools.

Where is this Size 4 Anti-Tilt Chair used?

The Dark Grey Reinforced Senior Primary Chair is a popular specification for Year 5 & Year 6 Classrooms, Primary IT Suites, School Dining Halls, and After-School Clubs. Its modern colour and specific dimensions (Size 4) make it a versatile asset for senior primary and middle school providers.

Key Features

  • Anti-Tilt Geometry – Stable base design prevents dangerous backward tipping during lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for long-term institutional use.
  • Size 4 (8-11 Years) – Correct ergonomic scaling for the senior primary stage.
  • 15-Year Warranty – Extensive cover for the structural frame and shell integrity.
  • No Nuts or Screws – Anti-tamper construction ensures a smooth, student-safe finish.
  • Stackable 10-High – Maximises floor space efficiency in busy classrooms.
  • Anti-Slip Feet – Colour-coded feet protect flooring and provide easy size identification.
  • UK Manufactured – High-quality British production with a minimal environmental 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 specific load-bearing and safety requirements of senior primary furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to ensure your school budget goes further.
  • Sustainability Partners: Fully recyclable materials help your institution meet its carbon reduction goals.
  • Reliable Support: Our experienced team provides expert guidance from product selection to final installation.

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, significantly reducing the risk of pupils tipping backwards during focused study.
  • Compliance with BS EN1729 Part 1 ensures the 380mm seat height is ergonomically suitable for the 8-11 age group, preventing back strain.
  • The Smooth-Finish Construction eliminates the need for nuts and screws, ensuring no sharp points can catch on school blazers or uniforms.
  • A Reinforced Undercarriage adds substantial structural support, ensuring the chair can withstand the increased weight requirements of Year 6 pupils.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and the high-impact shell, offering total peace of mind for business managers.

The Size 4 Dark Grey Reinforced Chair combines certified ergonomic support with senior primary safety engineering. These specifications detail the heavy-duty materials and dimensions that make it the responsible choice for schools.

Age Group
8-11 Years (Size 4)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
380mm
Standard Size 4 for Year 5 / Year 6
Total Dimensions
380mm(H) x 350mm(W) x 320mm(D)
Senior Primary profile
Leg Finish
Grey Metal
Durable and professional
Construction
Reinforced Undercarriage
Enhanced structural lifespan
Safety Feature
No Nuts or Screws
Anti-tamper and uniform safe
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports carbon reduction 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 4" the correct choice for Year 5 & 6 pupils?

A: Yes. Size 4 is the industry standard for children aged 8 to 11 years. With a seat height of 380mm, it allows senior primary students to sit with feet flat on the floor, which is vital for postural health and concentration as they prepare for secondary school.

Q: Why is the "no nuts or screws" design important for senior primary schools?

A: Safety and durability are paramount. By removing external fixings, we eliminate the risk of pupils loosening parts or tampering with the frame. It also ensures no sharp metal edges can catch on school blazers or jumpers.

Q: How many chairs can be stacked together 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 wet play or multi-purpose 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 posture, 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 4" specification. This allows staff to instantly identify the correct furniture for the 8-11 year age group, preventing mix-ups in schools with multiple year groups.

Q: Is the Dark Grey plastic easy to keep clean?

A: Yes. The high-grade polypropylene is non-porous and hides scuff marks well. It can be wiped down easily with a warm damp cloth and non-abrasive cleaner to maintain hygiene standards after messy art lessons or lunch.

Q: Are these chairs genuinely British made?

A: Yes. Every chair in this range is designed and manufactured in the UK. This ensures a low carbon footprint, superior quality control, and reliable availability for our UK-based customers.

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 efficient and reliable.

Overview

Product Overview: Size 4 Dark Grey Reinforced Senior Primary Chair

The Cobolt Dark Grey Reinforced Chair is the standard-setter for modern senior primary interiors. Delivered with Free UK Mainland Delivery, it is built to survive the "Upper KS2 routine"—heavy usage, daily room rearranging, and the specific ergonomic needs of 8-to-11-year-olds.

The Cobolt Advantage

  • Financial Assurance: Our industry-leading 15-year guarantee protects your capital investment, ensuring these chairs serve multiple cohorts of pupils throughout their senior primary journey.
  • Floor Space Flexibility: Designed for multi-use halls, these units stack securely up to 10 high, allowing for rapid room clearance during lunch, drama, or assembly.
  • Visual Sorting: Colour-coded anti-slip feet correspond to the Size 4 standard, enabling staff to instantly identify and organise senior-height furniture at a glance.

Ergonomics & Sustainability

  • BS EN1729 Compliance: Specifically dimensioned for the 8-11 demographic (Size 4), the shell encourages natural spinal alignment during essential desk-based learning and exams.
  • Recyclable Engineering: Designed for a circular economy, the chair can be fully disassembled into its core components for responsible local recycling at end-of-life.
  • Pupil Comfort: The anatomically contoured backrest provides vital lumbar support, helping students stay focused and comfortable during longer lessons.

Anti-Tamper Construction

We prioritise classroom safety. By excluding all nuts and screws from the exterior assembly, we have created a smooth, tamper-proof profile that removes the risk of fixings being loosened or clothing being caught.

The Cobolt Standard

  • 50 Years of Expertise: We have spent half a century supplying the UK public sector, ensuring every chair meets the highest benchmarks for durability and student safety.
  • Free UK Mainland Delivery: We manage all transport logistics at no extra cost, providing a transparent, budget-friendly procurement experience.
  • Education Specialists: Our UK-based team offers dedicated support for classroom refits and bulk order scheduling for primary and middle schools.

Features & Benefits

Where is this Size 4 Anti-Tilt Chair used?

The Dark Grey Reinforced Senior Primary Chair is a popular specification for Year 5 & Year 6 Classrooms, Primary IT Suites, School Dining Halls, and After-School Clubs. Its modern colour and specific dimensions (Size 4) make it a versatile asset for senior primary and middle school providers.

Key Features

  • Anti-Tilt Geometry – Stable base design prevents dangerous backward tipping during lessons.
  • Reinforced Undercarriage – Extra steel bracing ensures exceptional durability for long-term institutional use.
  • Size 4 (8-11 Years) – Correct ergonomic scaling for the senior primary stage.
  • 15-Year Warranty – Extensive cover for the structural frame and shell integrity.
  • No Nuts or Screws – Anti-tamper construction ensures a smooth, student-safe finish.
  • Stackable 10-High – Maximises floor space efficiency in busy classrooms.
  • Anti-Slip Feet – Colour-coded feet protect flooring and provide easy size identification.
  • UK Manufactured – High-quality British production with a minimal environmental 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 specific load-bearing and safety requirements of senior primary furniture.
  • Free Delivery (UK Mainland): We absorb shipping costs to ensure your school budget goes further.
  • Sustainability Partners: Fully recyclable materials help your institution meet its carbon reduction goals.
  • Reliable Support: Our experienced team provides expert guidance from product selection to final installation.

Safety & Warranty

Built for Safety. Backed for Reliability.

  • The Anti-Tilt design provides a secure foundation, significantly reducing the risk of pupils tipping backwards during focused study.
  • Compliance with BS EN1729 Part 1 ensures the 380mm seat height is ergonomically suitable for the 8-11 age group, preventing back strain.
  • The Smooth-Finish Construction eliminates the need for nuts and screws, ensuring no sharp points can catch on school blazers or uniforms.
  • A Reinforced Undercarriage adds substantial structural support, ensuring the chair can withstand the increased weight requirements of Year 6 pupils.
  • We offer a market-leading 15-year manufacturer's guarantee. This covers the reinforced frame and the high-impact shell, offering total peace of mind for business managers.

Specification Dimensions

The Size 4 Dark Grey Reinforced Chair combines certified ergonomic support with senior primary safety engineering. These specifications detail the heavy-duty materials and dimensions that make it the responsible choice for schools.

Age Group
8-11 Years (Size 4)
Material
Reinforced Plastic
Guarantee
15 Years
Specification
Details
Purpose / Benefit
Seat Height
380mm
Standard Size 4 for Year 5 / Year 6
Total Dimensions
380mm(H) x 350mm(W) x 320mm(D)
Senior Primary profile
Leg Finish
Grey Metal
Durable and professional
Construction
Reinforced Undercarriage
Enhanced structural lifespan
Safety Feature
No Nuts or Screws
Anti-tamper and uniform safe
Stacking Ability
Up to 10 High
Excellent space management
Sustainability
Recyclable Components
Supports carbon reduction 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 4" the correct choice for Year 5 & 6 pupils?

A: Yes. Size 4 is the industry standard for children aged 8 to 11 years. With a seat height of 380mm, it allows senior primary students to sit with feet flat on the floor, which is vital for postural health and concentration as they prepare for secondary school.

Q: Why is the "no nuts or screws" design important for senior primary schools?

A: Safety and durability are paramount. By removing external fixings, we eliminate the risk of pupils loosening parts or tampering with the frame. It also ensures no sharp metal edges can catch on school blazers or jumpers.

Q: How many chairs can be stacked together 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 wet play or multi-purpose 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 posture, 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 4" specification. This allows staff to instantly identify the correct furniture for the 8-11 year age group, preventing mix-ups in schools with multiple year groups.

Q: Is the Dark Grey plastic easy to keep clean?

A: Yes. The high-grade polypropylene is non-porous and hides scuff marks well. It can be wiped down easily with a warm damp cloth and non-abrasive cleaner to maintain hygiene standards after messy art lessons or lunch.

Q: Are these chairs genuinely British made?

A: Yes. Every chair in this range is designed and manufactured in the UK. This ensures a low carbon footprint, superior quality control, and reliable availability for our UK-based customers.

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 efficient and reliable.

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