Great dress!
I ordered this dress to wear to a charity gala. I ordered a large. The large fit my bust, but the straps were a tad too long and the hem was a tad too long. A medium would have been better for the strap length and the hem length, but there's no way it would have zipped. I had it tailored and it was perfect. No need for a bra either. The cut and structure of the dress provided plenty of support for me, and I have a pretty big bust.