I'm usually a 0-2 and the size small fit perfectly. My back-up size was unavailable last minute, but RTR's customer service truly shined and sent me 2 back-up dresses for free. Thankfully I didn't need to use them as the Herve dress fit, but I am thankful that was an option. I would definitely recommend this dress for a wedding or cocktail party. My husband loved so much I may have to rent this one again :)