XL fits a man who is 5'8" with 36"waist 40" chest, average to slightly above average in the pouch area, can be worn over a jockstrap too. The butt opening is a decent placement but you may miss out on a little bit of perineum exposure. Overall, hot. I also fit okay in it and I'm 5'6" with 46" waist and did not expect to fit in it at all.