I wasn't impressed with this costume. For the price I paid I wasn't expecting to have to alter the sleeves to add more fabric to widen them, just so my son could fit his arms through. It wasn't a matter of the costume running small, I think the only thing that could have fit in the sleeves was a broomstick they were so narrow.  The mask to go with it was cheap too, although I expected that, it got broken a few days after Halloween.  It was enough to get us through two hours of trick or treating, that's the best I can say.