Keycap Profiles Explained: Cherry, SA, OEM and Low Profile

Look at two mechanical keyboards side by side and the keys can seem completely different. One set is tall and rounded like an old typewriter, another is low and crisp, a third is almost flat. Those differences come down to keycap profile. Profile affects how a keyboard looks, how it feels under your fingers and even how it sounds. Here is what the common profiles are and how to tell them apart.

What is a keycap profile?

A keycap profile is the shape of a keycap set: how tall the caps are, the shape of the top surface, and how each row is angled. Profiles fall into two broad groups.

• Sculpted profiles give each row its own height and angle, so the keyboard forms a gentle curve that follows your fingers.
• Uniform profiles make every row the same, so any cap can go in any position.

The top surface matters too. A cylindrical top curves in one direction, like the inside of a tube lying sideways. A spherical top dips in the middle like a shallow bowl, which cradles your fingertip.

What are the main keycap profiles?

Four profiles cover most keyboards you are likely to meet.

Profile	Height	Top shape	Rows	Feel
Cherry	Medium-low	Cylindrical	Sculpted	Crisp, comfortable for fast typing
OEM	Medium	Cylindrical	Sculpted	Familiar, slightly taller than Cherry
SA	Tall	Spherical, deep dish	Sculpted	Retro, rounded, more travel to the top
Low profile	Very low	Flat or shallow	Usually uniform	Slim, close to a laptop keyboard

Cherry profile

Cherry profile takes its name from the original Cherry keycaps. It is sculpted with a cylindrical top and sits a little lower than OEM. Many enthusiasts like it because it feels precise and keeps your fingers close to the keys.

OEM profile

OEM is the profile you will find on many pre-built mechanical keyboards. It is sculpted like Cherry but slightly taller. If you have used a mechanical keyboard bought off the shelf, there is a good chance it was OEM.

SA profile

SA is tall, rounded and sculpted, with a spherical dish that cups each fingertip. It recalls older computer terminals and typewriters, which is why it is so often paired with beige and cream colourways. The extra height takes some getting used to, but many people love the look and the full, rounded sound.

Low profile

Low profile keycaps are thin and nearly flat, made for low-profile switches with shorter travel. They suit slim keyboards and people who prefer a laptop-like feel.

Uniform profiles such as DSA and XDA

Uniform profiles skip the sculpting, so every row has the same height and angle. DSA is low with a spherical dish, and XDA is a little taller with a wide, shallow top. Because any cap fits any position, uniform sets are popular for custom layouts and for keyboards with unusual key arrangements. The trade-off is that the keyboard feels flatter, without the curve that guides your fingers between rows on a sculpted set.

Is PBT or ABS better for keycaps?

It depends on what you value, since each plastic has trade-offs.

• PBT is a harder, denser plastic. It usually has a slightly dry, textured surface and resists developing shine from finger oils. It is often described as sounding a little deeper.
• ABS is smoother and takes vivid colours well. It is the classic material for doubleshot keycaps. Over time, heavily used ABS keys can develop a shiny, slick surface.

If you want caps that look new for a long time, PBT is a safe pick. If you want saturated colours and crisp legends, good doubleshot ABS is hard to beat. Plastic also changes sound, which our guide on why mechanical keyboards sound good covers.

What does doubleshot mean?

Doubleshot keycaps are moulded in two shots of plastic. The first shot forms the legend (the letter or number), and the second forms the cap around it, or the other way round. The legend is a solid piece of plastic that runs through the cap, so it cannot wear off.

Other legend methods you will see:

• Dye sublimation, where dye is absorbed into the plastic. It is common on PBT and also very durable, though it works best with dark legends on light caps.
• Laser etching or printing, which is cheaper and can fade with heavy use.

How do keycap profiles show up in Calcurate?

Calcurate draws every key on its calculator as a real mechanical keycap, with a tapered skirt, a dished top and a plastic texture. Its six keycap sets each borrow from a real profile and material, so the guide above maps directly onto them.

Set	Profile	Material	Look
Calcurate (default)	Cherry	PBT	Warm off-white numbers, slate operators, red AC, amber =
Terminal	SA	PBT	Retro beige
Midnight Neon	Cherry	Doubleshot ABS	Dark caps with cyan, violet and pink legends
Sakura	SA	PBT	Soft pink and cream with a sage =
Ice Jelly	Cherry	Translucent	Icy blue caps with the switch showing through
Carbon	Low profile	Doubleshot ABS	Grey and black with orange accents

The pairings follow real-world habits. Terminal uses SA and beige because that combination is classic retro. Midnight Neon uses doubleshot ABS because bright legends on dark caps are what that method does best. To swap sets, you hold any key for three seconds until the cap pops off, then pick a new set from a carousel. The Keycap Studio page shows how it works, and the mechanical keypad page covers the sound and feel.

How do you choose a keycap profile?

Start with comfort, then pick the look. A simple way to decide:

1. If you type fast and want precision, try Cherry.
2. If you want something familiar, OEM is the common default.
3. If you love a retro look and do not mind height, try SA, ideally with a wrist rest.
4. If you want a slim board, go low profile, and make sure your switches match.

Check compatibility before you buy. Most keycap sets fit the common cross-shaped switch stem, but low profile switches often need their own caps, and some keyboards use non-standard key sizes on the bottom row.

Keycaps are only half of the retro calculator look. The other half is the display, and our history of the vacuum fluorescent display explains where that green glow came from. For everything else the app does, see the features overview.