Girls Dressy Socks with Color Trim 100% nylon Small - Sock Size (5 - 6.5), Shoe Size 4-8(C), S(4-6YRS) Medium - Sock Size (6 - 8), Shoe Size 6-12(C), M(6-8YRS) Large - Sock Size (7.5 - 10), Shoe Size 11 - 6(C), L(7-10YRS) X-Large - Sock Size (9 - 11), Shoe Size 4 - 10, XL(11-14YRS)