Amazing dress!
I bought the purple, tried both small & medium, kept the medium. For me, the medium was a tad longer and slightly looser but I made it work with the back lacing. It is a stunning dress for any formal occasion, and the compliments never stopped. I wore it for a winter formal event. Undergarments can be a challenge since the back is so low. You may need a sticky bra or not, depending on your comfort level. Highly recommend!