A bright orange student chair engineered for optimal postural alignment, featuring a unique rear leg extension to prevent leaning back in class.
Vivid tangerine classroom seating with protective floor bungs and a high-tensile steel frame, providing a secure and energetic seating option for students.
Size chart showing school chair dimensions by age group, including height, seat depth, and weight for children aged 3 to 14+ years. Ideal for selecting age-appropriate classroom seating.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Orange Anti-Tilt Secondary Seating

The Cobolt Orange Size 5 Chair delivers a high-performance foundation for students moving into Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and constant movement required in bustling Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Standards: Adhering to Size 5 EN1729 regulations, the 430mm seat height ensures secondary students maintain a healthy lumbar position while keeping feet firmly planted.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution’s carbon reduction targets through British manufacturing.
  • Fatigue-Reducing Design: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • Vivid Hygiene Solution: The non-porous orange shell resists staining from ink and laboratory chemicals, allowing staff to maintain hygiene standards with a simple wipe-down.
  • Tamperproof Integrity: We utilize industrial-grade, secure fasteners to lock the shell to the slate-grey steel frame, ensuring a permanent, rattle-free experience that resists daily vandalism.
  • Vertical Storage: Efficient stacking capabilities allow for easy classroom floor clearing and space management during out-of-hours maintenance.

The Cobolt Standard

  • 50-Year Quality Benchmark: Leverage five decades of institutional knowledge with seating designed specifically to meet the rigorous safety demands of UK secondary students.
  • Complimentary Delivery Service: We provide Free UK Mainland Delivery on all institutional orders, ensuring a simplified and honest pricing structure for school business managers.
  • Fifteen-Year Financial Shield: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture budget for the long term.

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

The Orange Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Art Studios, and Secondary Libraries. Its adult-strength frame combined with student-specific proportions makes it a versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution’s carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary users, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated study or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer’s guarantee, covering structural frame integrity and shell defects for long-term reliability.

The Size 5 Orange Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 education.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Adult-width ergonomic support
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Weight Capacity
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly lifecycle

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

FAQs: Secondary Education Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, essential for maintaining correct sitting habits during the transition from primary school.

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

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing accidents.

Q: Is the Zest Orange shell resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, chemicals, or school supplies cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid amber colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel frame. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning teams to clear floor space efficiently after the academic day ends. Their lightweight 4.3kg build makes them easy to move.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for high-traffic environments.

Overview

Product Overview: Size 5 Orange Anti-Tilt Secondary Seating

The Cobolt Orange Size 5 Chair delivers a high-performance foundation for students moving into Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and constant movement required in bustling Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Standards: Adhering to Size 5 EN1729 regulations, the 430mm seat height ensures secondary students maintain a healthy lumbar position while keeping feet firmly planted.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution’s carbon reduction targets through British manufacturing.
  • Fatigue-Reducing Design: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • Vivid Hygiene Solution: The non-porous orange shell resists staining from ink and laboratory chemicals, allowing staff to maintain hygiene standards with a simple wipe-down.
  • Tamperproof Integrity: We utilize industrial-grade, secure fasteners to lock the shell to the slate-grey steel frame, ensuring a permanent, rattle-free experience that resists daily vandalism.
  • Vertical Storage: Efficient stacking capabilities allow for easy classroom floor clearing and space management during out-of-hours maintenance.

The Cobolt Standard

  • 50-Year Quality Benchmark: Leverage five decades of institutional knowledge with seating designed specifically to meet the rigorous safety demands of UK secondary students.
  • Complimentary Delivery Service: We provide Free UK Mainland Delivery on all institutional orders, ensuring a simplified and honest pricing structure for school business managers.
  • Fifteen-Year Financial Shield: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture budget for the long term.

Features & Benefits

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

The Orange Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Art Studios, and Secondary Libraries. Its adult-strength frame combined with student-specific proportions makes it a versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution’s carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Safety & Warranty

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary users, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated study or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer’s guarantee, covering structural frame integrity and shell defects for long-term reliability.

Specification Dimensions

The Size 5 Orange Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 education.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Adult-width ergonomic support
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Weight Capacity
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly lifecycle

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

FAQs: Secondary Education Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, essential for maintaining correct sitting habits during the transition from primary school.

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

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing accidents.

Q: Is the Zest Orange shell resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, chemicals, or school supplies cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid amber colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel frame. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning teams to clear floor space efficiently after the academic day ends. Their lightweight 4.3kg build makes them easy to move.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for high-traffic environments.

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

Product code: CH45OR
Inject a surge of creative energy into your senior learning environments with the Cobolt Zest Orange Polypropylene Anti-Tilt Chair (Size 5 / 11-14 Yea...

Inc VAT

Exc VAT

£56.00

£46.67

Colours - Orange
Age - 11-14 Years

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Trusted UK Supplier 50 years. Established. Reliable.

Free UK Mainland Delivery Clear. Upfront pricing.

Overview

Features

Safety & Warranty

Specifications & Dimensions

Delivery & Returns

Product FAQs

Product Overview: Size 5 Orange Anti-Tilt Secondary Seating

The Cobolt Orange Size 5 Chair delivers a high-performance foundation for students moving into Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and constant movement required in bustling Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Standards: Adhering to Size 5 EN1729 regulations, the 430mm seat height ensures secondary students maintain a healthy lumbar position while keeping feet firmly planted.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution’s carbon reduction targets through British manufacturing.
  • Fatigue-Reducing Design: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • Vivid Hygiene Solution: The non-porous orange shell resists staining from ink and laboratory chemicals, allowing staff to maintain hygiene standards with a simple wipe-down.
  • Tamperproof Integrity: We utilize industrial-grade, secure fasteners to lock the shell to the slate-grey steel frame, ensuring a permanent, rattle-free experience that resists daily vandalism.
  • Vertical Storage: Efficient stacking capabilities allow for easy classroom floor clearing and space management during out-of-hours maintenance.

The Cobolt Standard

  • 50-Year Quality Benchmark: Leverage five decades of institutional knowledge with seating designed specifically to meet the rigorous safety demands of UK secondary students.
  • Complimentary Delivery Service: We provide Free UK Mainland Delivery on all institutional orders, ensuring a simplified and honest pricing structure for school business managers.
  • Fifteen-Year Financial Shield: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture budget for the long term.

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

The Orange Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Art Studios, and Secondary Libraries. Its adult-strength frame combined with student-specific proportions makes it a versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution’s carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary users, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated study or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer’s guarantee, covering structural frame integrity and shell defects for long-term reliability.

The Size 5 Orange Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 education.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Adult-width ergonomic support
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Weight Capacity
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly lifecycle

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

FAQs: Secondary Education Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, essential for maintaining correct sitting habits during the transition from primary school.

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

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing accidents.

Q: Is the Zest Orange shell resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, chemicals, or school supplies cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid amber colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel frame. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning teams to clear floor space efficiently after the academic day ends. Their lightweight 4.3kg build makes them easy to move.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for high-traffic environments.

Overview

Product Overview: Size 5 Orange Anti-Tilt Secondary Seating

The Cobolt Orange Size 5 Chair delivers a high-performance foundation for students moving into Key Stage 3. Dispatched with Free UK Mainland Delivery, it is built to survive the high-frequency cleaning and constant movement required in bustling Year 7, 8, and 9 classrooms.

Secondary Ergonomics & Sustainability

  • KS3 Posture Standards: Adhering to Size 5 EN1729 regulations, the 430mm seat height ensures secondary students maintain a healthy lumbar position while keeping feet firmly planted.
  • Eco-Responsible Lifecycle: Constructed from 100% recyclable polypropylene and steel, this chair supports your institution’s carbon reduction targets through British manufacturing.
  • Fatigue-Reducing Design: The downward-curved front edge removes pressure points behind the knees, preventing restlessness during double periods or exam sessions.

Institutional Resilience

  • Vivid Hygiene Solution: The non-porous orange shell resists staining from ink and laboratory chemicals, allowing staff to maintain hygiene standards with a simple wipe-down.
  • Tamperproof Integrity: We utilize industrial-grade, secure fasteners to lock the shell to the slate-grey steel frame, ensuring a permanent, rattle-free experience that resists daily vandalism.
  • Vertical Storage: Efficient stacking capabilities allow for easy classroom floor clearing and space management during out-of-hours maintenance.

The Cobolt Standard

  • 50-Year Quality Benchmark: Leverage five decades of institutional knowledge with seating designed specifically to meet the rigorous safety demands of UK secondary students.
  • Complimentary Delivery Service: We provide Free UK Mainland Delivery on all institutional orders, ensuring a simplified and honest pricing structure for school business managers.
  • Fifteen-Year Financial Shield: Reflecting our confidence in UK craftsmanship, every unit carries a 15-year warranty, securing your furniture budget for the long term.

Features & Benefits

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

The Orange Size 5 School Chair is the primary specification for Key Stage 3 Classrooms, Science Laboratories, Art Studios, and Secondary Libraries. Its adult-strength frame combined with student-specific proportions makes it a versatile solution for diverse educational settings.

Key Features

  • Anti-Tilt Safety Frame – The angled rear legs proactively inhibit students from rocking back, reducing secondary classroom accidents.
  • Size 5 (11-14 Years) – Precision-engineered 430mm seat height for the mid-secondary age demographic.
  • 15-Year Structural Guarantee – Industry-leading warranty covering both frame welds and plastic shell integrity.
  • 4.3kg Unit Weight – Robust construction that remains manageable for staff to move and stack.
  • Slate Grey Powder-Coating – A high-quality metallic finish that resists scratches, scuffs, and daily wear.
  • Stackable Architecture – Efficient vertical stacking allows for easy classroom reconfiguration and floor clearing.
  • High-Impact Polypropylene – The shell is resistant to ink, school chemicals, and staining, allowing for instant sanitisation.
  • Tamperproof Shell Fasteners – Secured fixings ensure the seat remains permanently and safely attached to the frame.
Warranty icon
15-year manufacturer guarantee
Free delivery icon
Free UK Mainland Delivery
UK manufactured icon
Made in UK

Cobolt Service: Partnering with UK Secondary Estates

  • 50 Years of Expertise: We understand the specific durability and hygiene needs of high-traffic senior school environments.
  • Free UK Mainland Delivery: We manage the delivery of institutional refits at no extra cost, keeping your project within allocated budgets.
  • Sustainability Goals: Our domestic manufacturing and 100% recyclable materials support your institution’s carbon reduction targets.
  • Reliable Support: Our UK-based team is available to help bursars and estates managers select the correct sizing for their specific demographics.

Safety & Warranty

Senior Safety. Guaranteed Reliability.

  • The Anti-Tilt rear geometry is a crucial design feature for secondary users, shifting the balance point to proactively prevent dangerous tipping habits.
  • Strict adherence to BS EN1729 Compliance ensures the seat height (430mm) and depth (380mm) are perfectly scaled for the 11-14 year old stature.
  • The Waterfall Seat Front eliminates hard edges behind the knees, maintaining healthy circulation during extended seated study or exam sessions.
  • Industrial-grade Tamperproof fasteners provide a permanent, rattle-free connection between the polypropylene seat and the powder-coated grey legs.
  • Every unit is backed by a 15-year manufacturer’s guarantee, covering structural frame integrity and shell defects for long-term reliability.

Specification Dimensions

The Size 5 Orange Anti-Tilt Chair combines certified secondary ergonomics with an adult-strength safety frame. These specifications detail the materials and dimensions that make it the responsible choice for Key Stage 3 education.

Target Ages
11-14 Years (Size 5)
Material
100% Polypropylene
Guarantee
15 Years
Specification
Details
Institutional Benefit
Seat Height
430mm
Standard Size 5 for Year 7 through Year 9
Seat Dimensions
405mm (W) x 380mm (D)
Adult-width ergonomic support
Total Dimensions
800mm(H) x 460mm(W) x 550mm(D)
Stable secondary classroom profile
Unit Weight
4.3kg
Robust yet easy to move for staff
Weight Capacity
125kg (19.6 stone)
Superior structural resilience
Compliance
BS EN1729 Compliant
Certified ergonomic and structural safety
Sustainability
100% Recyclable
Eco-friendly lifecycle

Delivery & Returns

FREE Delivery to UK Mainland Zone 1

Your order will be delivered on a standard 5 Working Days service.

For all other locations, please email help@coboltfurniture.co.uk for a quote.


  • Made to Order: Many of our products are manufactured specifically for your order. Because of this, returns depend on the product specifics and require prior permission from Cobolt Furniture.
  • Cancellations: We always endeavour to reduce cancellation costs. However, please note a partial or entire charge may be levied to cover material costs and administrative fees if a made-to-order line is cancelled.

Product FAQs

FAQs: Secondary Education Seating Specialist Advice

Q: Is a "Size 5" chair correct for Years 7 through 9?

A: Size 5 (430mm seat height) is the ergonomic standard for students aged 11 to 14 years. It ensures that secondary students can sit with a flat-footed stance, essential for maintaining correct sitting habits during the transition from primary school.

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

A: Secondary students are often active and prone to rocking on their chairs. The angled rear frame shifts the leverage point further back, making it mechanically difficult for the chair to tip backwards, thereby proactively preventing accidents.

Q: Is the Zest Orange shell resistant to staining?

A: Yes. The high-grade polypropylene shell is non-porous. Spills from ink, chemicals, or school supplies cannot penetrate the surface and can be wiped away easily without leaving residues or fading the vivid amber colour.

Q: Can adults safely sit on these Size 5 chairs?

A: Yes. Despite being dimensioned for students, the powder-coated steel frame is rated for a massive 125kg. This makes it perfectly safe for teaching staff to sit briefly during group work without structural risk.

Q: Are the seats tamper-proof to prevent interference?

A: Absolutely. We use industrial-grade tamperproof fasteners to secure the shell to the grey steel frame. This ensures students cannot loosen the fixings and that the chairs remain a permanent, safe asset in your school.

Q: How easy are these chairs to store during cleaning?

A: These chairs are designed for vertical stacking, allowing cleaning teams to clear floor space efficiently after the academic day ends. Their lightweight 4.3kg build makes them easy to move.

Q: Does this chair comply with fire and safety regulations?

A: Yes, it is fully compliant with BS EN1729 Parts 1 & 2, which are the specific standards for UK secondary furniture regarding ergonomics, strength, and structural durability.

Q: Why purchase from Cobolt Furniture?

A: With 50 years of manufacturing expertise, we are a trusted partner to UK education. We offer Free UK Mainland Delivery, expert product knowledge, and furniture built specifically for high-traffic environments.

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