Pack includes 7 pairs of crew socks. Rib-knit cuffs. Soft-knit fabric, with comfortable stretch. Notched seams at toe and heel for added comfort. Size S = socks fit shoe sizes 11-13. Size M = socks fit shoe sizes 13-3Y. Size L = socks fit shoe sizes 3Y-5Y. machine wash according to the care instruction label spandex 3% polyester 71% cotton 26%