If you are building a custom mechanical keyboard, one question comes up every time: which keycap profile should you choose?
The profile of a keycap — its shape, height, and sculpting — directly affects how your keyboard feels, sounds, and how fast you can type. Picking the wrong one can make even the best switches feel off. Get it right, and every keystroke becomes a pleasure.
In this guide, we break down the three most popular profiles — SA, OEM, and Cherry — so you can make the right choice for your next build.
What Is a Keycap Profile?
A keycap profile refers to the shape, height, and curvature of a keycap. Unlike uniform keycaps where every row is the same shape, most mechanical keyboard profiles are sculpted — each row has a different angle and height to match the natural movement of your fingers as they reach across the keyboard.
The profile determines three things:
- Typing feel — how your fingers glide between rows
- Sound signature — taller keycaps tend to produce deeper, fuller sounds
- Aesthetics — the overall silhouette of your keyboard
SA Profile: Tall, Sculpted, and Retro
SA (Spherical All) keycaps are the giants of the keycap world. They stand tall with a high spherical dish on top, giving each key a distinct, scooped feel under your fingertips.
Key Characteristics
- Height: The tallest of the three — about 12-14mm at the highest row
- Top shape: Deep spherical scoop (concave)
- Sculpting: Heavily sculpted — each row has a different height and angle
- Material: Typically double-shot ABS plastic
Who Loves SA?
SA is beloved by enthusiasts who prioritize typing feel and sound above all else. The tall, scooped profile forces a more deliberate typing motion. The sound is deep and thocky, especially on linear switches with foam in the case.
OEM Profile: The Industry Standard
OEM (Original Equipment Manufacturer) profile is what you will find on most pre-built mechanical keyboards. It is the default for good reason.
Key Characteristics
- Height: Medium — about 10-11mm at the highest row
- Top shape: Cylindrical (slightly concave, curves in one direction)
- Sculpting: Moderately sculpted
- Material: Available in both ABS and PBT
Who Loves OEM?
OEM is the jack-of-all-trades. It works well for both typing and gaming. If you are coming from a typical office keyboard or a gaming board, OEM will feel immediately familiar. It is also the most cost-effective option.
Cherry Profile: Low, Fast, and Loved by Typists
Cherry profile was originally designed by Cherry GmbH for their iconic G80 and G81 keyboards. It is shorter than OEM, with a distinct spherical dish that many typists swear by.
Key Characteristics
- Height: The lowest of the three — about 8-9mm at the highest row
- Top shape: Spherical scoop (similar to SA, but much shallower)
- Sculpting: Sculpted, but more subtle than OEM
- Material: Most commonly available in PBT
Who Loves Cherry?
Cherry profile is the typist choice. The shorter height reduces finger fatigue during long typing sessions. Combined with the spherical dish, it offers precise, confident key placement.
SA vs OEM vs Cherry: Comparison Table
| Feature | SA | OEM | Cherry |
|---|---|---|---|
| Height | Tall (12-14mm) | Medium (10-11mm) | Low (8-9mm) |
| Top Shape | Deep spherical | Cylindrical | Shallow spherical |
| Sound | Deep, thocky | Neutral | Crisp, clacky |
| Gaming | Not ideal | Good | Very good |
| Price | Premium | Affordable | Mid-range |
| Best For | Enthusiasts | All-round, beginners | Typists, ergonomics |
FAQ
Can I mix keycap profiles?
Yes, but not recommended. Mixing profiles often leads to inconsistent row heights. Some builders intentionally mix for specific layouts, but it is an advanced technique.
Are SA keycaps bad for gaming?
Not bad, but not ideal. The tall height means your fingers travel further, which can slow down rapid key presses. Competitive gamers generally prefer Cherry or OEM profile.
Does keycap profile affect sound?
Absolutely. Taller profiles like SA have more internal volume, creating a deeper, more resonant sound. Lower profiles like Cherry produce a crisper, higher-pitched clack.
Ready to Find Your Perfect Keycap Set?
At KeycapsHub, we carry a wide selection across all three profiles — from budget OEM PBT sets to premium SA collections and ergonomic Cherry profile caps.
Browse: All Keycap Sets
Pro Tip: Not sure which profile fits your typing style? Grab a cheap OEM PBT set first to learn the basics, then upgrade to SA or Cherry once you know what you like.