Orthodox standard type. The most popular (^^) (The safest (^^;) Size Underarm width (reference value) Men's Japanese size Super wide 82cm 4-5L Wide size 72cm 2-3L Standard size Regular size R size 62cm M-XL Free size Medium size M size 58cm M-L size Slim size S size 54cm S-M size S size is the Japanese size for men S-M and women M-L, and we can accommodate smaller sizes. M The size is around the Japanese men's M size. (Size between S size and standard size) Same as the standard type with buttons, but only the end of the hem is squared compared to the standard size. Underwear The size is the same for S and M sizes.It has a waist circumference of about 120cm and is worn by tightening the waist strap.As this is a standard mass-produced product, the shirt and pants are made separately, so the top and bottom may have slightly different colors. Yes. Also, since Kinari uses raw fabric before bleaching, there may be fiber residue or stains. Thank you for your understanding.