"I bought this costume for my 9 year old son who is tall and very thin. Most of his clothes are size 10/12 and fit him nicely. I bought size 10/12 in this costume. It was very tight and short. The piece for his face is very cheaply made. I sent it back. Usually I love everything I buy from this site but was very disappointed in this costume. I wouldn't recommend buying this and if you do only buy it for a smaller child. Get a bigger size though."