I got this via Amazon Prime, which is a great feature since returns are at no cost for shipping. However, I was not able to fit into it because it was too small. I usually run about size 12 on pants/jeans and size 14 for shirts/dresses. And the large size did not fit me. I was not able to get it past my shoulders or my hips when unzipped. The waist area on the costume seems to be very tight. So, if you have hips and wide shoulders, I would get the largest to try on for size or just consider another costume.This costume arrived pretty fast, when it came it had a lot of wrinkles. I'm going to have to iron it at a low setting to get them all out. I ordered the small, and at first I thought no way would it fit! But after my friend zipped it up, it fit like a glove. Only downside is, it has literally no stretch. The arms are kind of stiff and while I have some room in the waist and bust, it is tight on the back and I find it hard/impossible to breath in/yawn. It fits true to size though and is meant to be form fitting, my friend told me if I went a size up it would be too long, be saggy in the waist and give the "grandma boob" I guess I will just have to suck it up and be uncomfortable, it is gorgeous.