Current socks past due? Try our library card yellow socks. Product Details Unisex 75% cotton, 20% polyester, 5% spandex Color: yellow Size & Fit Small: Shoe Sizes: 5.5-9/Sock: 9-11 Large: Shoe Sizes: 8.5-12/Sock: 10-13 Each purchase helps to fund literacy programs and book donations to communities in need.