FREE UK Delivery* on most major brands and all orders over £600

Cosm Mid Back Chair Leaf Arms in Nightfall Cosm Mid Back Nightfall with Leaf Arms - Front Cosm Mid Back in Graphite with Leaf Arms Cosm Midback Fixed Arms Cosm Mid Back Graphite Chair with Height Adjustable Arms Cosm Mid Back Fixed Arms Detail in Nightfall Cosm Mid Back Graphite Detail Cosm mid Back Semi Polished Base Carbon Fixed Arms Location Cosm Mid Back Nightfall with Leaf Arms Location Cosm Highback in Glacier with Leaf Arms Measurements of Cosm All Cosm

Cosm is a design that creates a new reference point for instant, personalised comfort. The smooth feeling of natural balance allows you to change postures as easily as possible. Studio 7.5 and Herman Miller have perfected the self-adjusting tilt by inventing a complex but finely tuned mechanism. The chair has been further enhanced with the option, on certain specifications to have 'leaf arms', these being the first of their kind. They follow overall functional and aesthetic intent of the chair providing a simple and super slim visual appearance with superior comfort. In addition they make holding a phone or a book natural and comfortable. The angle of the arms means they don't get in the way of the desk when it comes to getting back to business.


Lead times vary between 2-9 weeks, depending on selected finishes. Please also see our 'in stock' models for immediate delivery.

  • Weight balancing synchronous mechanism (non-locking as standard)

  • Auto-Harmonic Tilt

  • Intercept suspension

  • Flexible frame

  • Dipped in colour option

  • 4 Arm options

  • Instant comfort

  • Three back heights (please see other pages) Low Back Chair and High Back Chair

  • Personalised ergonomic experience

  • Maximum user weight 159kg

  • Depth: 67.8cm

  • Width: 67.8-74.4cm

  • Height: 98-114cm

  • 12 Year Warranty

Delivered fully assembled

Standard Frame Colours



Studio White

Dipped Frame Colours




If your business is furnishing an office, requires additional chairs or wants to upgrade existing ones, let us know. We're here to assist, offering expert advice on products, configurations and setup, along with the best bulk order quote

Contact us on 01603 722483 or fill out our contact form for bulk order enquiries.

At Office Furniture Scene, we pride ourselves in supplying top quality, UK manufactured products to our customers & will not supply cheap imported furniture. The vast majority of our products are made to order in a high-tech UK manufacturing facility & our stated lead time for these items is 10-14 working days. Products which have a longer lead time are indicated on the individual item page. Arranged installation of your order may sightly extend this lead time.

Many products available on our site are subject to free delivery. This can be seen by the free delivery icon on the product page. Products without free delivery are subject to delivery costs of 10% of your net order value and are subject to VAT charges. There is a minimum delivery cost of £20.00 & orders with a value in excess of £600 (excluding VAT) qualify for free delivery. Delivery charges are visible in the Checkout process.

Unfortunately, at present, we are only able to deliver within the UK mainland and cannot deliver or install at some remote UK highlands & islands.

To maintain a cost effective service to our customers, we may vary the delivery method based upon your location or order size. Some large, heavy items may need to be delivered separately from your main order due to carrier limitations. We will inform you if this is the case.

Unless your order is being installed by one of our teams, the order will be delivered to a ground floor entrance location.

Herman Miller Cosm Chair Adjustment Guide

Download Guide

See description for lead time

This is a bespoke, made to order item.

Need it quicker?

View our in stock range for faster delivery times.

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Why Use Us?

Nationwide Service

Local business mentality, national service.

Quality Products

Our quality products are handpicked, offering you only the best.

Free Delivery

Free delivery on all orders over £500 and other selected products

Expert Advice

Our UK based staff are experts in their field, offering personable and honest advice.

Customer Dedication

Our five star trustpilot rating represents our dedication to our customers and their needs.

Domestic or Commercial

Experienced working alongside businesses from home based enterprises to large corporations.

Authorised Herman Miller Retailers

Herman Miller is truly the benchmark when it comes to luxury office furniture. Each product is engineered to provide maximum comfort, ergonomic excellence and are all created with style. Here at Office Furniture Scene, we are authorised Herman Miller online retailers meaning we can supply most of the current range of Herman Miller products. Simply contact us if you cannot see the product or specification you require.

Latest Reviews

OFS have been very helpful setting up an order for 5 chairs for our office. They have been of great assistance with regards to sorting out the order and communication has been brilliant.


Ordered a Herman Miller Embody chair with a one-week delivery time, received a phone call after placing the order to confirm delivery for the next day! Chair arrived well packaged, would definitely recommend.


I highly recommend this place for a working from home office chair. Really helpful advice and a chance to see which chair suited me best.


Ordered a Herman Miller chair from OFS and was delivered next day, I couldn't get the gas lift to work, they were in touch the same morning and resolved over the phone. Great customer service would definitely recommend.


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