Quick answer
There is no official standard, but in practice a micro-compact is about 5.8–6.1″ long and 4–4.6″ tall with 10–13 rounds of 9mm (SIG P365, Hellcat); a subcompact is a short-gripped gun around 6.25–6.7″ long (Glock 26, CZ P-10 S, Glock 43X); and a compact is about 6.6–7.5″ long and 4.8–5.4″ tall with 15–17 rounds (Glock 19, P365-XMACRO).
Manufacturers use these labels loosely — Glock calls the Glock 48 a subcompact even though it has a Glock 19-length slide — so it helps to look at real dimensions instead of names. The ranges below come from the manufacturer specs of the 30 carry guns we track.
Size classes by the numbers
| Class | Length | Height | Width | Weight | Capacity | Examples |
|---|---|---|---|---|---|---|
| 5.2–5.9″ | 4.0–4.1″ | 0.88–0.98″ | 9.8–13.8 oz | 6–12 (.380) | LCP MAX, Bodyguard 2.0, Glock 42 | |
| Micro-compact | 5.8–6.1″ | 4.0–4.6″ | 1.0–1.16″ | 17.8–21.3 oz | 10–13 | P365, Hellcat, Shield Plus, METE MC9 |
| Subcompact | 6.25–6.7″ | 4.2–5.0″ | 1.05–1.3″ | 17.8–25 oz | 10–14 | Glock 26, Glock 43X, CZ P-10 S, MC2sc |
| Compact | 6.6–7.5″ | 4.8–5.4″ | 1.0–1.34″ | 21–24.4 oz | 15–17 | Glock 19, P365-XMACRO, Hellcat Pro, PDP |
Ranges from manufacturer specifications of the guns we track (October 2026). Individual models fall outside these ranges.
Micro-compact
Micro-compacts are the modern default for everyday carry: thin (about 1–1.1″), light (around 18 oz) and holding 10–13 rounds. Their short grips are what make them easy to hide — and what makes them snappier and harder to shoot fast. Best for IWB and appendix carry in light clothing. See the best micro-compact 9mm pistols.
Subcompact
“Subcompact” covers two different kinds of gun: short double-stacks like the Glock 26 and CZ P-10 S (thicker, around 1.3″, with a stubby grip) and slim guns like the Glock 43X (thin with a longer grip). They usually shoot a little softer than micro-compacts but are slightly bigger in one dimension or another.
Compact
Compacts like the Glock 19 are the all-rounders: big enough for a full grip, 15+ rounds and easy accuracy, small enough to carry with the right holster, belt and clothing. Newer “crossover” guns such as the P365-XMACRO and Hellcat Pro combine compact grips and capacity with micro-compact width.
Which size should you carry?
- Light clothing, small frame, or deep concealment: micro-compact (or pocket gun for pockets).
- Want the easiest-shooting gun you can hide: compact or crossover (XMACRO, Hellcat Pro, Glock 48).
- One gun for carry, home and range: compact.
- Struggle with recoil: go bigger and heavier, not smaller.
Specific picks for each class are in our main best concealed carry guns of 2026 guide and the smallest 9mm pistols ranking.
FAQ
What is the difference between compact and subcompact?
A compact (like the Glock 19) has a longer grip and slide and typically holds 15+ rounds; a subcompact (like the Glock 26) shortens the grip — and often the slide — for concealment, typically holding 10–12 rounds.
Is a micro-compact smaller than a subcompact?
Usually, yes. Micro-compacts like the SIG P365 are generally thinner and lighter than traditional double-stack subcompacts like the Glock 26, while holding similar capacity.
Is a compact pistol good for concealed carry?
Yes, with a good holster, gun belt and suitable clothing. Compacts are easier to shoot well than smaller guns, which is why many experienced carriers choose them.