Men's Underwear Size
Flat-angle filament underwear
Men's underwear should first be loose, not too tight, cotton, if he often wears tight pants, he should choose legs, so that there will be no trace from the back. If he often wears pants, then he should choose triangle, so that it will not be very hot in summer. For size problems, the smallest size for men is S, the medium size is M, the large size is L, and adults generally have more M and L. Also have to choose according to waist circumference, if I think L size is OK in two feet five or six, otherwise I have to choose XL, XXL is the largest XXXL. Try to choose the same color as the pants he often wears, so as to avoid embarrassment.