Ordered this costume online. The size is for 4-6 y old but barely fit my 2 y old. Nothing worst than the day before Halloween when you realize the costume is too small but you have to use it because it's too late to get something else. Do not advertise those sizes anymore! They are way smaller than advertised. Ordered a costume for my 12 y old and the Large did not fit him although the me size chart showed his measurements. I had to return that one.