The purchase principle of men's underwear size

Firstly, men's  underwear should be loose, not too tight, cotton fabric is better, if you want to  wear tights will have to choose the boxers, so that there will be no  trace from the back, if you often wear trousers, it's better to Choose briefs so that it won't be hot in the summer. The problem of the size, the minimum number of men is S, M is medium, L is large, M, L are more for adult. You also can choose according to your waist circumference, if your waist circumference is in the two feet five  or six, L is ok, otherwise you can choose XL, XXL, the  largest XXXL. Try to choose the best color that you often wear to avoid jealousy.