Honestly, follow the sizing chart they provide in the photo gallery and use that to decide on what kind of fit you like. Note: this is for the jacket in the black style, not the 106_black, ash black, or 104_black.I'm 5'2", 138lbs, size 38B bust, I usually fit a small-medium range and, due to reviews, decided even to get a large at first. The large fit my chest and body just fine, with room to breath, and met a little below my hips in length but the arms were a lot longer than I liked and were veSee full review