I now own this sweater in both black and the plum color. I normally wear a size 10-12 and wear a 36D bra size . I often times buy sweaters in a size large. Not this sweater! After buying and returning both the large and the medium sizes I was very happy with the fit of the size small. I'm 5 foot 3" and the medium was far too big on my shorter frame. The small is actually still very roomy! I was even tempted to try this sweater in an extra small! I did find the black seemed to have a roomier fit than the plum. But despite the size variation between colors both fit me perfectly in a size small. The fabric is so soft, wears incredibly well and is amazingly warm and snuggly. Be careful to hand wash in cold water and dry flat. I've read other reviewers made the mistake of machine washing and tumble-drying...which will ruin this sweater. Buy this with confidence.. but size way down! I also bought the Prana willow duster.. another gorgeous sweater!