My husband bought the Sugoi jersey for me in the medium since he saw all of my other jerseys are mediums. Even with a generous bust I probably could wear a small. I didn't return it because I felt I was in between the small and medium. If you like more pro fit I would go down a size. The waist flares slightly and has no elastic, so down a size will probably give a slimmer fit.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan