iKingsky Men's Breathable Lace Boxer Sexy Low Rise Underwear 85% Polyamide 15% Spandex Soft and Breathable Waist: US S=China M:28"-30"; US M=China L:31"-33": US Large =China XL:34"-36": You select size is US Size,but we send product tag size is China Size.The China Size is bigger one size than you order.Because of the China size is about 1 size smaller than US size.And our company product tag is printed in China size only.For example,you order size "M", we will send you the item with China label size "L" Try our other underwears, wroth to have a see