An office chair is judged on adjustment points most buyers never check before purchase, and marketing language that describes features which do not actually move. This guide explains what genuinely separates a good chair from an expensive one, before you look at a single product.
Quick answer: Look for independent seat height, backrest angle and lumbar adjustment that genuinely moves. Below roughly £150 these are usually missing or token; above roughly £600 you are mostly paying for materials and warranty.
Who this guide is for
Anyone buying their first proper office chair, or trying to understand why a chair that looks similar to another costs three times as much.
Who this guide is not for
If you already understand chair adjustability and want specific product recommendations, see our best office chairs guide instead.
A note on how this guide was built: this is a research-led guide, based on manufacturer documentation and established ergonomic guidance. See our Methodology.
Chair types
Most home office chairs fall into three categories. Task chairs are compact, mesh-backed, and built around adjustability rather than cushioning — the default choice for most desk work. Executive chairs prioritise cushioning and a taller backrest, often at the cost of some adjustability. Ergonomic specialist chairs — the Herman Miller and Steelcase category — are engineered around a specific ergonomic problem, usually spinal support, rather than general comfort.
Ergonomics: what the word actually means here
“Ergonomic” describes a chair that adapts to your body rather than requiring your body to adapt to it. That adaptation happens through specific, checkable adjustment points — not through a marketing label. A chair is only as ergonomic as the adjustments it actually offers, which is why the rest of this guide is organised around those adjustments individually.
Lumbar support
Genuine lumbar support adjusts in two directions: height, so it sits at your actual lower back rather than a fixed average position, and depth, so it pushes into your back rather than sitting flush against the backrest. A fixed lumbar bump moulded into the backrest is not lumbar support in any adjustable sense — it is a shape that happens to suit whoever it was designed around.
Seat depth
The gap between the front edge of the seat and the back of your knees should be roughly two to three finger-widths. Too deep, and the front edge presses into the back of your knees, restricting circulation. Too shallow, and your thighs lack support. Seat depth adjustment — usually a sliding seat pan — is one of the adjustments most often skipped at lower price points, and one of the hardest to compensate for afterwards.
Armrests
Height adjustment matters most — armrests set too high push your shoulders up, the same problem a desk at the wrong height causes. Width and pivot adjustment matter more for typing posture than most buyers expect: armrests fixed too wide apart encourage reaching inward, which tenses the shoulders over a full working day.
Materials
Mesh breathes and stays cool over long sessions, which is why it dominates the ergonomic-specialist category. Foam with fabric or faux leather feels more substantial initially but runs warmer during extended use. Neither is objectively better — mesh suits long, continuous sessions; foam suits shorter, more varied working patterns.
Adjustability as a whole system
Individual adjustments only work together. A perfectly adjusted lumbar support does not compensate for the wrong seat depth, and correct armrest height does not fix a backrest angle that pushes you forward. Set them in order — seat height first, then seat depth, then lumbar, then armrests, then tilt tension — since each later adjustment depends on the ones before it being correct.
Common buying mistakes
- Buying on cushioning alone. A soft seat feels comfortable in a showroom for two minutes and says nothing about how it feels after four hours.
- Trusting “ergonomic” as a label rather than checking specific adjustments. Ask what actually moves, not what the chair is called.
- Ignoring your own body type. Adjustment ranges have limits — a chair that fits an average frame may not fit someone notably taller, shorter, heavier or lighter, regardless of price.
- Assuming premium always means better. Some expensive chairs solve a specific problem — back pain, extreme sitting duration — that most buyers do not have.
Maintenance
Check the gas lift cylinder and tilt mechanism for play or sagging every year or two — these are the parts most likely to wear on a daily-use chair. Mesh backs generally need only occasional vacuuming; fabric and faux leather benefit from a wipe-down to prevent the buildup that eventually cracks or stains the surface.
Frequently asked questions
Is mesh always better than foam?
Not always — mesh suits long, continuous sitting because it breathes, but foam can feel more supportive for shorter, more varied working patterns. Neither is objectively superior.
Do I need a headrest?
Only if you regularly recline or lean back — for upright desk work, a headrest is rarely load-bearing and is more about preference than ergonomic necessity.
How do I know if a chair actually fits me?
Set seat height first so your feet are flat and knees roughly level with your hips, then check seat depth, then lumbar position. If any of these cannot be adjusted to fit, the chair does not fit you — regardless of its price or reputation.
Once you understand what to check, see our best office chairs for home working guide for specific recommendations across five different budgets, or our home office setup guide for how the chair decision fits into the rest of your setup.
Last reviewed: 22 July 2026. Next review due: October 2026.