I ordered a small and a medium dress and I was running 120 lb and 5ft tall. This dress was very comfortable throughout the night and kept me very cool in a very crowded room. It fell at a good length for me because it was so short. The only negative is that you definitely need to use tape to attach the top to your bra because it will slide down. I probably would have worn the medium except it was a little baggy in the chest area even though I am very busty for my age. I would definitely wear this dress again!