My 4 year old loves the scooby costume. However, the sizing is way off. After reading reviews that said the sizing is small, I ordered child medium/ size 8-10. My son wears size 5 clothing, and there's lots of room in size 5 for him... The size 8-10 costume is about 4 inches too short for him. Luckily the bottom of the costume is not like a footed sleeper... it has foot holes with velcro stirrups. So it's okay that it's a little short. But I think he could have worn a size large just fine. We will definitely be able to see his shoes when he's wearing the costume, and the feet will not cover them. Luckily my son doesn't mind or even notice this. : definitely order a size (or two) up. Otherwise, this is a nice, cute costume.