I bought this one for my 3yr old. It was a little big but that was good. It was cold outside and i put his zipper pj's on underneath this costume . That did 2 things, kept him warm and bulked his costume up. He loved the outfit. He didn't like his mask. Mask is a little on cheaper side. I had to cut eyes bigger so he could see. The strap was a little stretchy like rubber band. I reccomend this costume. If you have trouble with mask, go to walmart in the optical center and get one of those $5 headband strechy things they put on glasses to hold on face. Just attach that to mask , That would be a comfortable and secure hold for mask.