Guide
60%, 65%, 75%, TKL or full size: which mechanical keyboard size?
By Noa, founder of Keyforge · · Updated October 12, 2026 · 3 min read
Size is the number of keys you keep — and therefore how much room your keyboard takes on the desk. The more compact it is, the closer your mouse gets; and the more you rely on key combinations to reach what was removed.
Sizes, from largest to smallest
Percentages are relative to a full-size keyboard. The exact key count varies between models and with the layout, ANSI or ISO (more on that below).
| Size | Keys | What goes | Best for |
|---|---|---|---|
| Full size | 104–105 | Nothing | Number entry, spreadsheets, accounting |
| 96% | About 98 | The gaps between blocks | A number pad without the width |
| TKL | 87–88 | The number pad | Gaming, office work, mouse closer in |
| 75% | About 84 | Blocks squeezed around the arrows | Compact while keeping the F-row |
| 65% | 68–69 | The F1–F12 row | The best compromise for many people |
| 60% | 61–62 | Arrows and F-row, moved behind Fn | Travel, minimalism, gaming |
| 40% | About 45 | Numbers and symbols, moved to layers | Enthusiasts ready to relearn |
Choosing for the way you work
- Lots of numbers (spreadsheets, accounting): full size or 96%. The number pad saves real time.
- Gaming: TKL, 75% or 65%. Your mouse moves back towards the centre and your right arm stays closer in.
- Coding and writing: 65% or 75%. The arrows stay, and Home/End or Page Up/Down are one shortcut away.
- Travel: 60% or 65%, small enough for a bag.
If in doubt, 65% and 75% suit most people: they only remove what is rarely used.
Fn and layers: what small boards ask of you
What a small keyboard drops does not really disappear: it moves to a layer, reached by holding an Fn key. On a 65%, Fn + 1 gives F1; on a 60%, Fn + a letter gives an arrow.
Many boards run open firmware such as QMK or VIA, which lets you remap every key and build your own layers. A few days are usually enough to adapt.
ANSI versus ISO
Two physical layouts share the market. ANSI, the American standard, has a horizontal Enter key and a long left Shift. ISO, common across Europe, has an L-shaped Enter over two rows, a shorter left Shift and one extra key next to it.
UK, German, French and Nordic layouts are built on ISO. You can type them on an ANSI board by changing the language setting, but one key is missing and the legends no longer match. Most enthusiast boards and keycap sets are designed for ANSI first: make sure an ISO version of the PCB and an ISO kit for the keycaps actually exist.
Compactness and ergonomics
A narrower keyboard brings the mouse closer to your body: your right shoulder opens less, which helps over a long day. It is the strongest argument for compact boards, ahead of looks.
Height matters too. A typing angle of 6 to 8° is common; any higher and your wrist bends back. A wrist rest at keyboard height helps with thick cases.
Check compatibility before you buy
- Case and PCB go together: a 65% PCB fits a 65% case, and the plate must match both.
- Keycaps: a 65% or 75% often needs a 1.75u right Shift, and space bars are not always the same length. See the keycaps guide.
- Stabilizers: their number follows the long keys of your layout — 4 on an ANSI 65%, more with a number pad.
To see how these parts fit together, read the anatomy of a mechanical keyboard.