The right size of Nike socks depends on a person's shoe size, and size charts are posted on Nike.com. Individuals can purchase Nike socks in four sizes: small, medium, large and extra large.
Small socks are designed for children who wear shoes sized 3Y to 5Y and women who wear shoe sizes from 4 to 6. Nike medium socks are for children who wear shoe sizes 5Y to 7Y, women who wear shoe sizes 6 to 10, and men with shoe sizes between 6 and 8. Women with shoe sizes 10 to 13 and men with shoe sizes 8 to 12 should wear large Nike socks. Extra large Nike socks are for men who wear shoes between size 12 and size 15.