This is a nice lightweight jacket, basic and simple, but sometimes that is all you need.  I got a medium, which fits great in the shoulders and waist, but I could have a much larger bust and it would fit even better.  It is by no means binding in the chest, and puffs out there a little bit more than I would like, but when I have a bulky sweatshirt on underneath it, it is not as obvious.  You can kind of see that in the photo of the model wearing it, the jacket is slimming at the waist, but not as form fitting in the chest area.  So be it, this is a safe bet for larger chested women I suppose.  The zippered pockets are always a huge plus, and the length so it covers the top of the pants.  I'm 5'7"/130/36B and the medium works, I  suspect the small would be too constricting in the shoulders.