SA keycaps are the tall, fully spherical profile behind the most dramatic retro builds in the hobby — high-rise caps with deep, rounded dishes that look like they were lifted off a beige 1970s terminal. Here's the honest catch up front: true SA is mostly a group-buy and limited-run product, and none of the vendors we source from stocks a genuine SA set right now. What you can buy today is the SA family — KSA, ASA, and OSA, vendor takes on the same spherical idea at different heights. This guide explains what SA actually is, how the family members differ, and the best SA-family sets you can order today.
What Is the SA Profile?
SA is one of the oldest keycap profiles still in production, made famous by Signature Plastics — the "S" is for spherical, and that's the defining trait: instead of the shallow cylindrical dip on OEM or Cherry caps, every SA key top is a round, saucer-like dish that cups your fingertip from all sides.
The other defining trait is height. SA is among the tallest profiles made — taller than the OEM caps most boards ship with, and in the same high-rise territory as MT3. That height brings three things:
- The retro look. Tall walls and rounded tops are what give SA builds their vintage-terminal, "spacecraft console" presence. No low profile can imitate it.
- The sound. Tall, thick-walled caps create a resonant chamber over the switch, producing the deep "clack" SA is famous for.
- The adjustment period. Your fingers travel farther and sit higher. Most people want a wrist rest with SA-height caps, and coming from a stock board it takes days, not minutes, to feel at home. If you want a zero-adjustment upgrade, an OEM set is the safe swap — SA is a deliberate change of feel.
Classic SA comes in row-sculpted and uniform versions, and most vintage-style sets are thick doubleshot ABS — part of that signature sound. Both Keychron family sets below are doubleshot PBT instead, which trades a touch of that classic acoustic character for legends that never fade and plastic that resists finger shine.
The SA Family: KSA vs ASA vs OSA
Because true SA runs are scarce, the big keyboard brands built their own spherical profiles. They're not clones — each one picks a different point on the height-versus-comfort curve:
| Profile | Made by | Height | Top surface | Best for |
|---|---|---|---|---|
| SA | Signature Plastics | Very tall | Deep spherical dish | The full vintage experience (group buys) |
| KSA | Keychron | Tall, heavily sculpted | Spherical | Closest buy-today stand-in for SA |
| ASA | Akko | Mid-height | Spherical, scooped | SA looks with less commitment |
| OSA | Keychron | OEM height | Spherical, scooped | Spherical feel, zero height penalty |
All three family profiles use standard MX cross stems, so they fit Cherry, Gateron, Kailh, Akko, and most other MX-style switches. And like nearly every tall spherical set, they're opaque — RGB glows around the caps, not through them.
The Best SA-Family Keycaps in 2026
Keychron Double Shot KSA PBT Keycap Full Keycap Set
The closest thing to classic SA you can put in a cart today. KSA is Keychron's tall, heavily sculpted spherical profile — the full high-rise dish that defines the SA feel — and this set delivers it in doubleshot PBT, so the legends are molded through the cap and can never wear off while the PBT surface shrugs off shine. Coverage is the other headline: the kit spans everything from 40% boards to full-size with Mac and Windows modifiers included, in seven mostly grayscale colorways — the White-on-Black version pictured is the purest retro-terminal look of the bunch. If you came here searching for SA keycaps, this is the set to buy first.
Pros: Tallest, most SA-like profile you can actually order; doubleshot PBT legends never fade or shine; enormous 40%-to-full-size coverage; clean grayscale colorways suit any build Cons: Full SA-style height means a real adjustment period (budget for a wrist rest); grayscale palette is restrained rather than flashy
Akko Black & Gold Keycap Set Hiragana Version (158-Key)
The statement pick, and the mid-height way into the family. ASA is Akko's spherical profile — the scooped SA-style dish on a lower, friendlier stance — and this 158-key set dresses it in a black base with gold legends, hiragana sub-legends, and a gold accent cluster and spacebar that light up an otherwise stealthy board. Coverage runs from compact layouts through full-size, and a keycap puller ships in the box. It's the set for someone who wants the spherical feel and a theme: the black-and-gold hiragana look sits naturally beside our favorite Japanese keycaps, but with a sculpt none of those Cherry-profile sets can offer.
Pros: Mid-height ASA is easier to adjust to than full SA; striking black-and-gold colorway with hiragana sub-legends; 158-key coverage plus included puller; gold accents make a build pop Cons: Bold theme won't suit a minimalist setup; lower profile than KSA if you want maximum retro height
Keychron Double Shot PBT OSA Full Set Keycap Set
The zero-risk way to try a spherical top. OSA keeps the familiar row heights of the OEM caps your board probably shipped with, then swaps the shallow cylindrical top for an SA-style spherical scoop — so your hands land exactly where they always have, but each fingertip settles into a rounded pocket. This 141-key doubleshot PBT kit covers 65% through full-size layouts and comes in seven colorways; the Blue & White version pictured pairs navy modifiers with white alphas and a pair of red Esc and Enter accents. If SA's height is the only thing stopping you, OSA removes the objection entirely.
Pros: OEM height means no adjustment period at all; spherical scoop still transforms the fingertip feel; doubleshot PBT durability; cheerful colorways with accent keys Cons: Doesn't deliver the tall retro silhouette that draws people to SA; 141 keys covers fewer niche layouts than the KSA kit
How to Choose Within the SA Family
All three sets share the spherical dish that defines SA — the choice is really about how much height you want to take on:
- Want the real SA experience: the Keychron KSA set is the tallest, most heavily sculpted option here and the closest stand-in for a true SA group buy you can order today.
- Want the look with less commitment: the Akko Black & Gold ASA set sits at mid-height — noticeably sculpted, far easier to adapt to, and the only one with a bold theme.
- Want the feel with zero adjustment: the Keychron OSA set keeps OEM height, so it types like the caps you already know with a rounder, more cradled fingertip.
If you're still mapping the profile landscape, our Cherry profile guide covers the low sculpted end, MT3 covers the other tall spherical school, and the keycaps hub lets you browse every direction side by side.
SA Keycaps FAQ
What does SA stand for? The "S" is for spherical — the rounded, dish-like top surface that defines the profile. SA originated at Signature Plastics decades ago and describes the shape and height of the caps, not their material or color.
Why can't I just buy a true SA set? Genuine SA runs are mostly group buys and limited restocks from a small number of makers, and as of this writing none of the three vendors we source from — KBDFans, Akko, or Keychron — has a true SA set in stock. The KSA, ASA, and OSA sets above are the buy-today alternatives, which is exactly why this guide covers the family rather than five unobtainable sets.
Are SA keycaps good for typing and gaming? They're beloved for typing feel and sound, but the height is real: expect an adjustment period and consider a wrist rest. For fast-twitch gaming many players prefer a lower profile — if that's you, OSA gives you the spherical top without the height, or see our Cherry profile picks for the low-and-fast school.
What's the difference between SA and MT3? Both are tall, spherical, row-sculpted profiles. MT3's dish is deeper and more angular, with a locked-in, guided feel, while SA's rounder, shallower saucer reads more vintage and lets fingers glide between keys more freely. Our MT3 keycaps guide covers that side of the tall-profile divide.
Will RGB shine through SA-family keycaps? No — these are opaque doubleshot sets, so per-key lighting glows around and beneath the caps rather than through the legends. If backlighting is the point of your build, a shine-through set is the better tool.
Final Verdict
You don't need to wait months for a group buy to get the SA look and feel. For most people the Keychron KSA set is the right first buy — it's the tallest, most faithful SA keycaps experience currently in stock, with doubleshot PBT durability classic SA rarely offers. Pick the Akko Black & Gold ASA set if you want a mid-height sculpt with a striking theme, or the Keychron OSA set if you want the spherical scoop with none of the height. Whichever branch of the family you choose, browse the keycaps hub for neighboring profiles or compare the most durable PBT keycap sets before you commit.