Before buying: note that costumes are not the same size as clothing, for best results, read reviews Made to cover head, child’s head should not fit through face opening; inflatable fan requires minimal assembly, please follow instructions Inflatable officially licensed jurassic world t-rex is standard child size Measurements will vary depending on amount of inflation, when inflated the jurassic world child’s costume, generally fits children younger than 7 but depends on length of torso and legs, maximum 50-inches tall Requires 4, aa batteries (not included); do not use rechargeable, nickel-cadmium; remove batteries from fan while not in use