adidas Youth Field Sock II Soccer Sock Nylon^Polyester^Spandex Imported ClimaLite technology to keep you cool and dry Matches to adidas footwear & apparel colors. Field Sock Sizing: Large fits Men's Shoe size 9-13 and Women's shoe size 10-12, Medium fits Men's Shoe size 5-8.5/Women's Shoe size 5-9.5/youth shoe size 4Y-6, Small fits Youth shoe size 13C-4Y, and X-Small fits Youth shoe size 9C-1Y.