I bought this Halloween costume for my daughter in the child's medium size, the largest children's size available. The medium is supposed to be a size 8-10. My daughter is 6 and normally wears a size 7 or 8, so I thought this costume might be slightly big on her. Wrong. The medium is really more like a 7 than an 8-10. Far worse, however, is the tiny wig that comes with the costume. My little girl burst into tears when the wig did not fit her head. Mind you, she has a normal sized head for someone her age; the wig is even too small on my 1-year old son! I compared the wig to the little knit cap that my son got in the hospital when he was born, and they are about the same size. (Did these manufacturers do any research at all before they sized this thing???) Now I am faced with the additional challenge of trying to find another orange wig with bangs in time for Halloween, or pray that stretching the wig over a bowling ball for a month makes it big enough to fit a head that is larger than a newborn's.