adidas Metro III Soccer Sock 100% Nylon Flat-knit soccer sock featuring intarsia logo and offset toe seams Arch compression for support and comfort Cushioned foot-bed Extra-small fits youth shoe sizes 9C-1Y. Small fits youth shoe sizes 13C-4Y. Medium fits Men's shoe sizes 5-8.5, Women's shoe sizes 5-9.5, & youth shoe sizes 4Y-410. Large fits Men's shoe sizes 9-13 and Women's shoe sizes 10-16.