Size Chart Description 83% Polypropylene/8% nylon/7% elastic/2% lycra® spandex Fitted leg Antimicrobial Odor control Blister control White toe Size Chart Small: For Shoe Sizes: YOUTH 12-5 and LADIES 4-7 Medium: For Shoe Sizes: MEN 6-9 and LADIES 7-10 Large: For Shoe Sizes: MEN 9-12 and LADIES 10-13 X-Large: For Shoe Sizes: MEN 12-15 and LADIES 13+