This will be my 2nd send back. I've got a 13 year old girl, 5'6" 120 pounds who normally wears a size 4. We got a 6, way too small, we got a 8, still way too small, so we don't want to deal with it anymore, the hassle of shipping things back. Just order big on these. If you get too big, at least you'll get a few years out of them.