Three numbers decide whether a desk works: how wide it is, how deep it is, and how much room there is underneath. Get those right and almost any desk will do. Get them wrong and the most beautiful desk in the world will irritate you daily.
Here is what each one means in a British room.
Width: 120cm is the honest minimum
A 120cm desk fits a monitor, a keyboard and a notebook open beside it without anything overlapping. That is the working definition of enough.
Below 120cm you start making choices. At 100cm you can have the monitor and the keyboard, or the keyboard and the notebook, but not comfortably all three. Fine for a laptop-only setup in a box room. Genuinely annoying for anything else.
At 140cm you get room for a second monitor, or for the deliberate empty space that makes a desk feel calm rather than crowded. If the wall allows it, take it.
- 100cm - laptop only, or a small secondary workspace
- 120cm - monitor, keyboard, notebook. The sensible default.
- 130 to 140cm - dual monitors, or one monitor with breathing room
Depth: 60cm, or the screen is too close
Eye strain at the end of a working day is usually a distance problem rather than a brightness problem. A 24 to 27 inch monitor wants roughly an arm's length between you and the panel, which is about 60 to 70cm.
A 60cm deep desk gives you that, just. An 80cm deep desk gives you that plus somewhere to put a mug that is not directly in front of the screen. If you run two monitors, or a monitor and a laptop on a stand, 80cm stops being a luxury.
If you are stuck with a shallow desk, a monitor arm buys back most of the difference by pushing the screen out behind the back edge.
Legroom: 66cm of clearance underneath
This is the measurement nobody checks and everybody regrets. Clearance is the gap between the floor and the underside of the desk top, and it has to take your knees, the arms of your chair, and any drawer that needs to open fully.
66cm is comfortable for most adults. Below about 62cm, chair arms start catching on the desk edge, and you end up sitting further back than you should, which quietly undoes all the work you did on depth.
Desks with a drawer or an apron rail under the top lose clearance to it, so check the stated clearance rather than the overall height.
Measuring your room before you buy
Three checks, in this order.
- The wall run. Measure the clear wall, then take 10cm off each end. A desk pushed hard into a corner is awkward to get behind and looks wedged in.
- Chair pull-back. You need roughly 90cm behind the desk edge to push a chair back and stand up. Mark it on the floor with tape before you order anything.
- Door swing and radiators. Between them, these are usually the reason a desk that fits on paper does not fit in the room.
Quick reference
| Setup | Width | Depth |
|---|---|---|
| Laptop only | 100cm | 60cm |
| Single monitor | 120cm | 60cm |
| Monitor and laptop | 130cm | 80cm |
| Dual monitors | 140cm | 80cm |
Clearance underneath should be at least 66cm in every case.
The short version
120 wide, 60 deep, 66 underneath. If the room takes more, take more. If it takes less, buy a monitor arm and accept that it is a laptop desk.
Every desk in the Settld desk range lists its width, depth and clearance on the product page, because those are the three numbers that decide it. If you are furnishing the whole room rather than just the desk, the full range is here.