Welcome to the forum. If you provide some specifics about yourself you might be happier with the suggestions you receive regarding pocket carry. Such as:
- Jeans, cargo pants, BDUs, Dockers, etc. (size of pocket)
- How close fitting are your clothes?
- Do you prefer semi-autos or revolvers?
- Are you willing to dress around the firearm or do you want the smallest size possible?
Pocket pistols have some inherent limitations in most instances as they are small in size and therefore limited on capacity. In addition, their small size and the laws of physics makes recoil in most of them significant.
My suggestions, based on what I have actual experience with carrying, are as follows:
Revolvers - S&W "J" frame hammerless or Ruger LCR in .38 special.
Semi-autos - sub-compact size - Glock 43 or 42, S&W Shield, and Ruger LC9s.
Semi-autos - micro/subcompact - Beretta Micro, Ruger LCP, Kel-Tec P32, Kel-Tec P 3AT.
Pocket holsters are very important, too, in the level of satisfaction with this carry method. I primarily use a S&W 442 or a Ruger LCP, both in horsehide holsters made by El Paso Saddlery. Occasionally I will carry the Glock 43 in a Kydex pocket holster that is thin (0.06") and shaped to contour around my thigh. I usually carry strong side if primary carry and weak side if using it for a back up.
Hope this is somewhat helpful in getting you thinking.