It all depends on what your wear and your frame/stature . If your like me a "big bone guy" , 6' 1" 280lbs, I am able to conceal a Sig Sauer P226 in a Blackhawk CQC Serpa holster with no issues. But if your on the smaller side then I think either a pancake or inside the waistband holster will do fine.
As mentioned I use a Blackhawk as an outside the waistband holster long with a Fist Inc close cropped holster for my Sig Sauer and Glock 26.
For inside the waistband I have a High noon holster .
I have a holster for each gun for what I am going to wear. That is really the only way to truly know what holster to use. And especially what is comfortable for you.