Sounds like you may have decided on a pocket but just to add,
I sometimes pocket carry a S&W 642. I've discovered that the cheaper ones of nylon and synthetic leather work for me just as well as the more expensive leather ones. I'm referring to the DeSantis Nemesis, Uncle Mikes and Mika (both round & square) are ones that I currently have and all seem to work fine. All are ambidextrous and can work in both front and rear pockets. Unlike some I've seen that say they are specific front or rear and right or left.
Of the 3, I'd prolly have to rate the Mika as my favorite. It stays put and retains its shape, even when in a pocket, to reholster without being a 2-handed affair. The Nemesis does to a point but the UM is flat as a pancake when gun is removed.
The only change I'd make is have the Mika an open bottom. That would allow the gun to sit another 1/2-3/4" lower. I spoke to Bob Mika years ago about doing one and he said he would. Next one I order I may do it but the origonal sq. bottom I got is still in use plus I bought a used rd bottom since then so don't know when I'll order. Bob is a super guy IMO.
Also if carrying in large cargo pockets get the sq. Otherwise I'd go rd.