I ordered a size s/m and it fit well. That's the size I use, and it fit comfortably. So it runs true to size. The material is polyester and has a bit of stretch and it's a little bit see-through. The dress is not the same one as in the picture, you get an inexpensive imitation to the one that you see in the picture. However, it's fine for the price. I wore it already and go compliments on it. The prints pattern is more of an orange than it is a red. The pattern used is not the same as the one in the picture (it doesn't have those side panels that the one on the picture shows.) like I said, it's not the same dress, but it's a nice dress, and that's why the 4 star rating.