iKingsky Men's Breathable G-string Underwear Sexy Low Rise Thong Panties Pack of 4 90% Polyamide 10% Spandex Stretch technology provides a body hugging fit,great shape retention and soft comfort Waist: US S=China M:28"-29"; US M=China L:30"-31": US Large =China XL:32"-33": 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 sexy lingerie, wroth to have a see