"Costume was for my 3 yr old son who is 34 inches tall...torso of the outfit fit great and was almost a little small...arms and legs of this outfit were 3ft too long...NOT KIDDING!! the "proton pack" was the same size as the adult one and was also the same size as my child so it was very awkward for him to wear...it would not even fit when tightend up all the way. For the price it was not a huge waste I just had to hem the arms and legs and we actually bought a different proton pack on ebay..."