Illustrated with love by Swantje Hinrichsen, this crib sheet features beautiful touches of watercolor and the most adorable underwater crew! Our fitted crib sheets are designed to fit US standard crib mattresses 52 x 28 inches. Made with soft 100% organic cotton sateen, 230 thread count. ***Note: Our shipping cartons hold 10 units each, which can contain a mix of styles. Please make sure your total Rookie Humans order is divisible by 10 to accommodate this.