I ordered a medium size for my 7 year old daughter. She wears 6x/7. The fit was good, the legs and sleeves were slightly longer than I planned. I was hoping to use it for another year. I bought this to wear my daughter's Elsa costume (and over thermals) when she went out on Halloween to keep warm. It worked great and she was glad she could go out in it (over thermal underwear) instead of covering her suit with a coat. Unfortunately, it doesn't wash well, even if you follow the washing instructions. The fabric has rolled up so much that it almost looks "fluffy" now. It's a shame to pay so much for a one off thing. If you are considering buying this may I suggest you line dry it - it might help with the peeling situation.