Bought this dress for my upcoming Vegas trip.  Just tried it on and it literally fits like a perfect glove.  I'm 5'2 137 lbs and a 34DD and ordered a medium.  The only thing I'm worried about is there is a bit of underboob action if you don't pull the top part completely down.  I'm hoping it doesn't ride up some wearing it.  If you're bustier on top this may be a problem for you too.  We shall see.  The material is very soft too.