The Blue Crew Socks are the perfect go-to sock for anything you throw at them. We believe socks should be comfy and stylish, so we made these. Made with 65% cotton, 30% polyester, and 5% spandex. One size fits all. All shoe sizes below fit comfortably in these socks: US (Men) US (Women) UK EU Japan (cm) Australia (Men) 6-12 7.5-13.5 5.5-11.5 39-46 24-30 5.5-11.5