I wear the regular white briefs, which are pretty comfortable, but a little undersized. I am going to suggest that if you are say, 34 inch waist like me, go for the large so your unit doesn't get squished. I also like their new geometric-pattern-on-white-background boxers: this is a retro style that is very cool and they did a super design job on them for cheap underwear. With the boxer too I like to buy them a size too big so I have the extra fabric to show off...
