100246

Herman Miller Aeron Onyx Executive Office Chair - Size B

£2,056.00 £1,599.00 Save 22%
Tax included. Shipping calculated at checkout.

Net Price: £1,332.50

2 in stock

Dispatched in 1 - 3 Days

Colour: Onyx Executive B

Elevate Your Workspace with the Herman Miller Aeron Onyx Executive Chair – Size B

Experience the gold standard in ergonomic seating with the Herman Miller Aeron Onyx Executive Office Chair Size B—a bold evolution of the iconic Aeron design, now reimagined in a sleek, matte black finish. Engineered for peak performance and all-day comfort, this chair blends cutting-edge support with timeless style, making it the ultimate upgrade for your home office or executive workspace.

Onyx is a stunning new colourway that we are also adding to Aeron. Aeron is boldly updated to Onyx, resulting in a high-contrast appearance that immediately stands out. Current design trends influenced the dramatic, ultra-matte black shade. 1.13 kilograms of ocean-bound plastic will be part of Onyx.

  • Ergonomic Excellence: Patented PostureFit SL technology supports your spine’s natural alignment, reducing fatigue and enhancing posture.

  • Size B – Perfect Fit: Designed for medium body types, Size B offers balanced support and adjustability for most users.

  • Breathable Pellicle Mesh: Keeps you cool and comfortable by allowing air, body heat, and water vapour to pass through.

  • Fully Adjustable: Customise tilt tension, seat angle, arm height, and lumbar support to suit your unique sitting style.

  • Sustainable Design: Made with ocean-bound plastic and recyclable materials—eco-conscious without compromising quality.

  • Striking Onyx Finish: A modern matte black aesthetic that complements any workspace with understated sophistication.

Specifications

More Information
Assembly Required No
Warranty 12 years, 3 shift warranty
Boxed Weight 22kg
Box Dimension 68 x 68 x 107cm
Product Weight Size A - 18.6kg
Size B - 19.5
Size C - 20kg
Height 1140mm
Width 720mm
Depth 470mm
Backrest Height 480mm
Backrest Width 376mm
Backrest Recline Angle 90° - 101°
Back Tilt Angle 86°/91°/116°
Base Diameter 655mm
Armrest Height Adjustable Armrests - 172 - 274mm
Fixed Armrests - 198mm
Seat Height 365 - 495mm
Seat Width Size A - 480mm
Size B - 514mm
Size C - 549mm
Seat Depth Size A - 400mm
Size B - 431mm
Size C - 470mm
Seat Tilt Angle -4°/1°/15°

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Delivery & returns

Estimated delivery times for all products range between 1 and 4 business days. Shipping prices shown are for Mainland UK only; we do not ship overseas or to the Republic of Ireland. Additional charges apply for Northern Ireland, the Isle of Man, and some Scottish Highlands locations. Most couriered items arrive next working day, except for these regions where deliveries may take longer. Royal Mail items typically arrive within three working days. Please check goods on delivery and sign as “damaged” or “unchecked” if any issues are visible. If you are out, you will receive instructions on where to collect or how to rearrange delivery.

Returns are accepted within 14 days of purchase, provided items are in original packaging and saleable condition. Faulty items should be reported promptly and may be returned for replacement or refund. For hygiene reasons, we cannot accept returns on mattresses, pillows, or personal items unless sealed. For full details and exceptions, please visit our Shipping & Returns page