The Baby Doll Fitted Sheet is designed to fit a standard size, 28 inch x 52 inch crib mattress. It has elastic all around for a snug fit. It is made of 100% cotton. Care instructions: warm hand or gentle machine wash with similar colors, do NOT bleach, line dry or gentle tumble dry low and remove promptly, warm iron. Do NOT rub, soak or wring. Do NOT dry clean.