ARCITON Men's Sexy Low Rise Jock Strap Thong 90% Chinlon and 10% Spandex(Mesh) Size: S Waist:27-30inch Size:M Waist:30-32inch Size:L Waist:33-35inch See-Through, T-Back, Stretch All the items will be shipped to the US by ePacketUSPSand it usually takes 7-17 working days Usually, the Asian size is smaller than US about 1 size. For example, the Asian M is often equal to the US S, and our item tag is printed in Asian size only.So you order size US"M", we will send you the item with China label size "L".And so on Thanks!