The Dr Seuss Cat in the Hat Set of 2 Short Crib Rail Cover measures 27 inches x 18 inches with 4 sets of ties. Crib wrap and tie with lightly padded for no more teeth marks. The backing has a waterproof lining to create a moisture barrier to protect crib finish. It is made of 100% polyester. Care instructions: Machine wash cold with like colors. Gentle cycle Do not bleach line dry only. Do not tumble dry, iron and dry clean.