On the size chart I was a medium, but I am busty and don't like anything tight.  I washed in cool water, tumble dried on delicate and ironed it. It is GORGEOUS!  If I had got the medium  dress it would definitely fit in the waist better, because I have plenty of extra room. The bust would've been too tight. I'm 5"2" and 125 lbs. and 34DD.