GHC Hosiery Size Chart:

Size S M L XL
Women’s Shoe Size 4-5 5½-7½ 8-10½ 11-13½
Men’s Shoe Size 5-7 7½-9½ 10-12 12½+

(Note: If your size specifications fall between sizes, you may prefer larger size. If you have an over developed calf muscle, use next larger size to ensure best comfort.)