From Amazon site description: Mario and his best buddy Yoshi are ready to stomp some koopas! Includes inflatable jumpsuit with faux legs and battery operated air inflating fan.(shirt, mustache, hat and batteries not included, requires 4 "AA" batteries) *I am including some mustaches and the hat that were never used. They did not come with the costume. The costume said one size fits all child. My son was 6 and is small for his age. I’d say it would fit age 4,5, 6 and 7 year old. He was about 42 pounds.