Deluxe247 is right that a real gun belt makes a lot of difference. A flimsy belt is a POS. Dillon Precision offers a double thickness 1.5" wide belt, and it makes a lot of difference in supporting the weight as well as not moving up when you draw. My holster is a Hunter 1502-0, which is a sort of 1 size fits all OWB slide style for med autos. It's not as elegant as if it were made specifically for the gun, but it is adequate once it breaks in to the gun, and I DO carry my S9 all the time. It's like buying shoes. Try on a few and see what fits. In any case, you're better off with with your .380 than a pocket knife.