I have a three week old baby and my body seems to change shape on a daily basis. This dress seems to fit great no matter what. I will say that it is not for extremely busty girls. I'm a 38C and I bought the medium. It is just big enough in the chest for me. If I was any bigger, I'd likely have to go up a size. The fit everywhere else is great. Because it's thicker than a regular jersey dress, it is very forgiving and flattering.