This is a 4 in 1 convertible product. The 4 leveled mattress support allows you to adjust according to your child's growth. The highest mattress position sits at 26 inches and the lowest at 9 inches. Product can be converted from a Baby Crib to a Day Bed/Love Seat, Toddler bed, or a Full-Size bed. With bed rails, sold separately, product can be converted into a Full-Size Bed.