I loved this dress and thought it would be perfect to celebrate my birthday in. Depending on the designer I am a size 2 or 4. After chatting with a fit specialist, I decided to go with a size small since I am 5'7 and definitely don't consider myself petite. Unfortunately, the small was HUGE on me, so much so that I couldn't wear it. I played with it a little and probably could have pulled it off if I pinned the straps and belted it, but without the adjustments it was just hanging on me - so much in the front that it would have been inappropriate to even leave my bedroom. Still love the dress, but definitely runs large!