"Purchased this for my 7 year old got a size medium fits just perfect but thats because shes slim the waist has a tight elastic , the dress is made of very thin material also as soon as my daughter tried it out one of the beadings in the wrap skirt came undone return the costume and company was great on exchanging too bad the same thing ended up happening to the new costume they sent me costume good for one or two wearings thats it !!"