ZIHAN Men's Breathable Mesh Stretch T Back Briefs Medium Black 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!