â— Tips before Purchase: the size is smaller than US, you may need to select 1 size up than your normal size. There are four sizes available: Size-------------Waist size Small------------26.0-29.1 inch / 66-74cm Medium---------28.3-31.5 inch / 72-80cm Large------------30.0-33.1 inch / 76-84cm X-Large---------31.5-34.6 inch / 80-88cm