For true pocket carry S&W 638-3, 642-1 with laser handle, 637-2...all of them fit a uncle mike's #3. I also have 1791 belt holster for them too. My only pistol pocket carry is a glock 42 in blackhawk #4 holster.
I hope this helps.
I have other small guns that could fit in a pocket but are too heavy...YMMV.
