most of mine are long gun types (shotguns and rifles). The only pistols I have aren't the "conceal-able" type.
if you're looking for concealed holsters, consider the situations you'll be in when concealing, type of clothing you normally wear, type of clothing people around you normally wear, and the type of firearm you want to conceal. If you wear a jacket or vest alot, a shoulder holster works well and offers a wide range of sizes. If you're into single layers, look at a belt bag with a concealed pocket. If your main concern is while traveling, a cross draw holster that's on your belt works well for easy access from a sitting position. There are several "inside-the-pants" types of holsters but unless you're a skinny dog, they ain't the most comfortable .
best solution is to visit a decent gun store and look at their options and talk with a salesperson