1. ✨【Size】S Waist (66-74cm), M Waist (70-78cm), L Waist (74-82cm), XL Waist (78-86cm). *Sizes are USA sizes, which are about one size larger than Japanese sizes. If you are between sizes, please choose the size that best fits your body type and preference. 2. ✨【Unique Design】This is a boxer brief with a T-back panty and a skirt-like front and back cover. The front and back covers can be easily lifted up, revealing the T-back pants underneath. 3. ✨【Looks like trunks, T-back inside】This men's sexy lingerie has covers on the front and back that look like trunks, which alleviates some of the embarrassment. It looks like trunks, but the T-back inside firmly holds the penis and testicles. 4. ✨【Uses】Perfect for lingerie, night shows, cosplay, role play, sports, entertainment, home wear, and as a gift. 5. ✨The structure and material fit the skin well, with a seamless design, making it very comfortable to wear. It's a must-have for any day.