AGE RANGE: The Sport Race Car Twin Bed is recommended for kids of all ages COOL RACE CAR LOOK: This kids twin bed is designed to resemble a classic race car with realistic details MATTRESS SIZE: Accommodates a standard size twin mattress (not included); Mattress is designed to sit low for your child's safety and ease--optional box spring sold separately BUILT STRONG: Made from durable, molded plastic; Made in USA SIZE: Assembled Dimensions (in inches): 47.5 (width) by 22.5 (height) by 94 (length)