Small ..... Seecamp 32 or newer 380..... small !
Rhorbaugh 9mm is great as are the new Glock 42 in 380 and Glock 43 in 9mm.
Those are my choices for “ultra concealment carry” ....
My son just bought a Glock 43 in 9mm.
I haven’t fired it yet, but he seems to like it.
However his hands are quite a bit smaller than mine.
When I held it I didn’t have any place for my pinky finger
and the ring finger was just barely hanging on.