WANGJIANG Men's Low Rise Cotton Boxer Brief 95% cotton + 5% spandex Waist: US XS=China S:26"-29"; US S=China M:30"-32"; US M=China L:33"-35"; US L=China XL:35"-37" 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!