The Frankie's Firetruck Twin Sheet Set includes a twin fitted sheet, twin flat sheet, and 1 pillow case. The sheets fit a standard size, 39 inch x 75 inch twin mattress. The pillow case is designed to hold a standard size, 20 inch x 26 inch pillow. They are made of 100% cotton. Care instructions: wash before use, machine wash cold with like colors, do NOT bleach, tumble dry low, and remove promptly.