First off, the sizing for this costume is super confusing. When ordering it says 12-24 months, when I received it, it said 2-4. It's definitely not 2-4 since my 16 months old barely fits in it. The part that disappoints me the most is the fact that the costume is really flat and 'deflated'. In the picture it looks nice and round with the fins sticking out. When I put the costume on my daughter, the fin was just dangling and you could hardly see that it was a shark. I will have to come up with something to keep the fins stiff for Halloween. The material is kind of scratchy. Next year I'll definitely go and buy my costume at a store and try it on first.