I am a 32.5 in waist and have 39" hips, the medium fits like a glove. I know that these are women's, but to be honest you cannot really tell the difference. There is plenty of stretch in the front to make room for the "man bit", it is a bit snug. But, at least for me, it is something that I love.
These make my bum, look great! Even though these are full coverage, they have a weird anti-gravity effect for my sweet cheeks. They definitely look perkier, anyways, I digress. I love these, the stretch, how fast they dry, the mad sex appeal. Everything, I obviously high recommend.
Happy speedoing!
P.S. I will try to get some pictures past the Amazon Review hit squad, and as always the more explicit ones will be on my Twitter or Insta (<--- some douche reported my insta and it is down for the time being)