I rented this dress for a rehearsal dinner and luckily had a few other back up dresses because this dress ran much larger than I had expected. I'm not an extremely tiny person, but the bust portion and waist of this dress were huge on me. I had ordered the S and was not able to order the P backup size because it was unavailable. My measurements are 34 bust and 26 waist to give an idea of the sizing of this dress. The hips are flowy, so no need to worry about sizing there. All in all, this dress is very cute, but it was just too big on me.