I purchased two XS (JP-M) items, but the size didn't fit, and I requested an exchange, which was denied. The product description stated the size as XS (JP-M). I tried on one of the two items, so I will only be listing one for sale. Two wine red, two dark gray, for a total of four items. Please refer to the following site for product details: https://www.temu.com/jp/ See "Home > Men's Underwear & Pajamas > Men's Underwear > 4-Piece Men's Thick Underwear Classic Fi..."