NCAA Champ Performance Crew Socks Poly Tek 81%,Spandex 8%,Nylon 6%,Olefin 5% Poly Tek 81%,Spandex 8%,Nylon 6%,Olefin 5% Made in the USA, soft comfortable, officially licensed 1/2 Cushion Crew w/ with comfort quality Arch Support and moister wicking material Small size 7-9 fits youth shoe size 10 1/2 - 4 Medium Size 9-11 - fits womens shoe size 6-11 or big kids shoe size 3 1/2-7 (average age 7-12) Large Size 10-13 - fits mens shoe size 8-13