The Dr Seuss Cat in the Hat Crib Sheet features 10" deep pockets and fits a standard 52" x 28" crib mattress. Elastic around the entire opening ensures a more secure fit. Sheet features a scatter print of the classic book's Cat in the Hat character. Fabric is made of 100% cotton. Care Instructions : Machine wash cold gentle cycle, do not bleach. Tumble dry low or line dry, do not dry clean.