The American Baby Company Supreme 100 Percent Jersey Crib/Toddler Sheet is made of super soft cotton that feels luxurious against a child s delicate skin. The edges are form-fitted with deep 9 pockets so they stay on securely. This knit crib sheet is designed to fit a standard 28 x 52 mattress. Once firmly in place it feels snug and smooth. This American Baby crib sheet pairs well with other pieces in the collection such as bedding bumper pads and much more (each sold separately). It is machine washable for easy care and also available in various colors to suit just about any nursery s existing decor.