Vitalsox OTC Compression Light Weight Socks VT1511 Silver Lycra Spandex Imported Size Chart: X-Small (Womens 3-6), Small (Womens 6.5-8, Mens 5-7.5), Medium (Womens 9-11, Mens 8-10), Large (Womens 11.5+, Mens 10.5-14). Due to the stretchability of the sock, if your shoe size is between sizes, choose the smaller. 75% Silver Drystat 15% Spandex 5% Lycra Silver Drystat - wellness from silver stops growth of fungus Superior moisture management. Machine washable, normal dry. Italy