Fit & Design: No show athletic max cushioned socks iWick(R) polyester fibers deliver a plush feel and extra cushioning No show tab height sits below the ankle for maximum versatility PerfectToe(TM) technology delivers a seamless fit to help prevent irritation Targeted compression in the arch delivers an enhanced fit for maximized comfort Size Chart: Sock Size: Small = Shoe Size: Women's 4-6.5 Sock Size: Medium = Shoe Size: Men's 6-8.5, Women's 7-9.5 Sock Size: Large = Shoe Size: Men's 9-12, Women's 10-13 Sock Size: X Large = Shoe Size: Men's 12-15.5