Herman Miller Aeron Size B Graphite Office Chair | In Stock, Fast Delivery

The Aeron Size B in Graphite is the best-selling medium sized ergonomic office chair from Herman Miller. This full specification model includes PostureFit SL, forward tilt, tilt limiter and fully adjustable arms, with fast UK delivery from Wellworking — designed to help you sit your best through long workdays.

Size B is the most popular Aeron size and suits the majority of users, making it the safest choice if you’re unsure which model to select.

Key Benefits

• Full Spec Aeron (In Stock): Includes PostureFit SL, forward tilt, tilt limiter and fully adjustable arms — the configuration most people actually want.

• Size B (Medium) Best-Seller: Recommended for users approx. 5'4" / 167 cm to 6'1" / 183 cm for a balanced, versatile fit.

• Breathable Pellicle Mesh: Keeps you cooler during long workdays by allowing air, heat and moisture to pass through the seat and back.

• PostureFit SL Support: Adjustable sacral and lumbar support designed to encourage healthier posture and reduce fatigue during extended sitting.

• Built for All-Day Work: Ideal for 6–10 hour desk days in home offices or professional workplaces.

• Fast UK Delivery: Delivered in 3–5 working days from Wellworking (UK stock).

• 12-Year Herman Miller Warranty: Peace of mind with manufacturer warranty when purchased from an authorised retailer.

Order today for fast delivery and experience the Aeron benchmark in ergonomic comfort.

What’s Included

• Herman Miller Aeron Chair Size B (Medium)

• PostureFit SL support system

• Tilt limiter and forward tilt

• Fully adjustable arms

• Choice of castors and armpads

• Delivered fully assembled (unless requested otherwise)

Best For

• 6–10 hour workdays

• Home working and office environments

• Users who prefer breathable mesh seating

• Users who want adjustable lumbar and posture support

• Extended sitting sessions

Wellworking Says…

“The Aeron in Graphite is the one we recommend most — a genuine all-rounder that suits almost everyone. Size B is our best-selling fit, and with fast delivery you can enjoy world-class ergonomic support at your desk within days.”

Herman Miller Aeron Chair FAQs

Where can I try a Herman Miller Aeron chair?

You’re welcome to try Herman Miller chairs with our team in London, Pershore or Galashiels. Contact us to book a showroom appointment.

Is the Aeron chair good for back support?

Aeron’s Pellicle mesh provides breathable comfort, while its multi-zone tension system reduces pressure and delivers targeted support. With extensive ergonomic adjustments, Aeron is designed to fit the user — not the other way round.

How do you adjust the seat height?

• To raise the seat: While not seated, lift the paddle-shaped lever on the right side upward.

• To lower the seat: While seated, lift the same lever upward.

Adjust so your feet rest flat on the floor or on a footrest.

How do you adjust the recline tension?

• Increase tension: Turn the knob on the right side forward (clockwise).

• Decrease tension: Turn the knob backward (counterclockwise).

Set the resistance to suit your preference.

What sizes are available?

The Aeron chair comes in three sizes:

• Size A (Small): 4’10”–5’4”

• Size B (Medium): 5’4”–6’1”

• Size C (Large): Over 6’

Need help choosing? Contact our team for quick advice.

How do I adjust PostureFit SL?

The PostureFit SL pads can be adjusted using the controls at the rear of the chair to fine-tune the level of lumbar and sacral support.

What warranty does the Aeron chair include?

Herman Miller provides a 12-year warranty covering parts and labour when purchased from an authorised retailer such as Wellworking.

Does the chair require assembly?

The Aeron chair arrives fully assembled and ready to use, unless knock-down delivery is specifically requested.

What colours are available?

Aeron is available in Graphite (dark grey), Onyx (black), Carbon (mid grey) and Mineral (light grey).