There is 2-3% difference according to manual measurement. please check the measurement chart carefully before you buy the item. NOTE!!! Size:(Please see the detailed size carefully to make sure you have chosen the right size) Please allow 0.2 - 0.5 inches differs due to manual measurement， thanks ^_^<br /><br />SIZE    S   M   L   XL   <br />-----------inch----------- <br />S Waist 33.07\