I actually carry a knife in the change compartment of my wallet. That way I can get double duty out of a single back pocket as well as carry my knife in a very discrete way. I rotate among several knives including a Small Sebenza, a 3.0" XM-18, a Laconico Slim EDC, a William Henry B7-FT, a Rod Olson Quick Flip, a CRKT Eros, a Damascus Leek, a Mini-Grip, and a few others.