Organic Cotton Premium 340 Sateen Sheet - Mini Sleeper Size: Natural High Thread Count upscale design and soft bedding Pure and Natural. Ideal for babies. Fits mini crib size 31(L) x 18(W), fits up to 4 inch thick mattresses. Fits Arms Reach sleeper in this size. Eco-friendly low impact colors and processing. Certified organic cotton. organic processing. No dyes and chemicals or pesticide