If you’re looking for something to keep in the cars glove box, under your seat, purse, or carry in the woods any size and caliber is suitable. But if you’re looking for a dedicated every day concealed carry search more along the lines of frame size, grip and capacity, then practice practice and practice. The Sig Sauer P365 9mm & .380 are quite popular and reliable micros. The 9mm can be snappy as hell the .380 is much more tame and great for small frame ladies and Nancy boys
. If you got large hands or simply looking for a better grip then the P365xl might be worth a look. All are a very concealable and most importantly IMO
very comfortable everyday carry with high mag capacity for their size. Everyone and their mothers make holsters for them too, lots of options.
When I carry now, it’s just a .38 special off-duty revolver with hard cast wad cutters in a very comfortable leather IWB holster. I use wad cutters as hollow points don’t achieve the velocity from a 1.5 inch barrel making useless for their intended purpose . Though wadcutters don’t expand or lose energy like a hollow point, they do penetrate! I also found someone who makes a IWB holster for my old Soviet TT-33, 7.62x25 mm which I carry once in a blue moon. But that’s kinda clunky.
If you plan to go out in the woods where black bears I’d go with a +p 10mm hard cast wad cutter would penetrate like a freight train straight past flesh, bone, fat, right into the boiler room with ease. Unfortunately some semi auto’s are kinda a finicky when it comes to finding the right brinell hardness and wad cutters that will feed properly. It’s definitely worth the time buying a few different boxes and researching by trial and error so you’re not stuck with a malfunction when you need it most. Or just get a wheel gun.