ZIHAN Men's Low Rise Mesh Thong Briefs 90% Chinlon and 10% Spandex Waist: US XS=China S:26"-29"; US S=China M:30"-32"; US M=China L:33"-35" 100% Brand New and High Quality Feature: Sexy, Breathable, Bodycare, Quick Dry & Comfortable Stretch technology provides a body hugging fit,great shape retention and soft comfort 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".Thanks!