Compatibility guide
Will these keycaps fit my keyboard?
Two things decide whether a keycap set fits: the switch stem and the layout. Get both right and any set drops on; get one wrong and it won't seat or won't cover the board. Here's how to check — from the factory that tools the caps.
1) Switch stem: most mechanical keyboards use MX-style switches with a + (cross) stem — standard MX keycaps fit them. 2) Layout: the set must cover your bottom-row widths, Enter / Shift shapes and any ISO / JIS keys. If the stem matches and the kit covers your layout, it fits.
Check 1 — the switch stem
A keycap clips onto the switch stem, so the stem type has to match. The vast majority of mechanical keyboards use MX-style switches (Cherry MX and the many compatible switches — Gateron, Kailh, TTC and others) with a + shaped (cross) stem. Standard keycaps, including ours, are made for these.
| Switch type | Stem | Standard keycaps fit? |
|---|---|---|
| MX-style (Cherry, Gateron, Kailh, TTC…) | + cross | Yes |
| Topre | Proprietary | No — needs Topre caps |
| Low-profile (Kailh Choc) | Different / smaller | No — needs low-profile caps |
| Older Alps | Rectangular | No — needs Alps caps |
If your board uses MX-style switches, stem compatibility is settled. For slim boards, we also tool low-profile keycaps separately.
Check 2 — the layout
Fitting the stem isn't enough; the caps also have to be the right sizes. Keyboards differ most in the bottom row — spacebar length, modifier widths, and how many keys sit beside the space — and in the Enter and Shift keys between ANSI, ISO and JIS. A set fits only if it includes the caps your layout needs.
- Bottom row: 60% and 65% boards use different modifier widths — a set needs the right ones.
- Enter & Shift: ISO needs a tall L-shaped Enter and short Shift; ANSI needs a wide Enter and long Shift.
- Extra keys: ISO adds one key; JIS adds several around the spacebar.
The full size-and-standard map is in our keyboard layouts guide.
Why kits exist
Because bottom rows and standards vary, a well-designed keycap set isn't one fixed list — it's a base kit plus extension kits that carry alternate modifier widths, ISO/JIS caps and stepped or non-stepped Caps Lock. That coverage is what lets one set fit many boards, and it's decided when the set is tooled — which also drives MOQ and cost.
Sourcing a custom set? Tell us the target
If you're commissioning a set, tell us the switch type (almost always MX), the sizes it must fit (e.g. TKL + 65% + 60%) and the standards (ANSI, or ANSI + ISO + JIS). We map the exact kit so every cap fits the boards you sell into. See how to send artwork to get started.
FAQ
Will any keycap set fit my keyboard?
If the switch stem (usually MX + cross) matches and the kit covers your layout — bottom-row widths, Enter/Shift, ISO/JIS — then yes.
Do keycaps fit all switches?
No — standard caps fit MX-style cross stems. Topre, Alps and low-profile Choc switches need caps made for them.
Why doesn't my set fit the bottom row?
Bottom-row widths differ between boards; a set fits only if it includes your modifier widths — which is why kits ship extra bottom-row caps.