When I'm wearing a tucked in shirt, I carry a spare (10-round) magazine for my Glock 26 (which would be carried in an ankle holster) and gives me 21-rounds total. When I'm wearing a shirt or something that covers my belt, then I carry two 10-round magazines in a magazine pouch which then gives me 31-rounds total.
I also carry a S&W 642 (5-rounds) as a BUG with two speed strips.
