I'm 5'5" and 140 lbs. I followed the size chart and decided to go with a medium, and I'm glad I did. Normally, my breasts are saggy, but this dress makes them look great! My husband loves it! I bought this dress for our anniversary trip and I'm so glad I did. It is actually very comfortable. I have a very low body mass index and my boobs must make up a large part of it because I have a very thin waist and no other fat. Girls with big boobs, buy this dress!