The Dr Seuss One Fish, Two Fish Long Crib Rail Cover measures 51 inches x 18 inches and secures with 5 - 6.5 inch ties. It fits crib rails measuring 8 to 18 inches around and protects your crib and your teething baby. The front is made of 100% polyester and the back waterproof mattress pad fabric. Filling is 100% polyester fiber batting. It is PVC, lead and phthalate free. Care instructions: machine wash cold with like colors in gentle cycle, do NOT bleach, line dry. Do NOT tumble dry, iron or dry clean.