Are your current socks past due? Our library card socks are perfect attire for weddings, arctic expeditions, heavy metal knitting competitions, or going to the library. They also make great gifts. Socks are made from 75% cotton, 20% polyester, and 5% spandex for a comfortable fit, wherever you wear them. Unisex size Large fits shoe sizes 8.5-12 / sock sizes 10-13.