Hello and thanks for your questions. Short answer is, no. You cannot go up 2 cup sizes utilizing fat transfer for breast augmentation. The usual increase gained would be 1 cup size. There are multiple reasons why this is the case, and I would encourage you to schedule a consultation and discuss your breast augmentation fat transfer treatment options with a Board Certified Plastic Surgeon certified by the American Board of Plastic Surgery (ABPS), who is a member of the American Society of Plastic Surgery (ASPS), and also a member of the American Society of Aesthetic Plastic Surgery (ASAPS), and a fellow of the American College of Surgeons (FACS) demonstrating their commitment to cosmetic surgery and excellence in surgery. Assure that they have multiple before and after photos of results that you like so that you can have an informed discussion about your breast enhancement and possible results. Best wishes! Daniel Brown, MD, FACS Diplomate, American Board of Plastic Surgeons Member American Society of Aesthetic Plastic Surgeons Member American Society of Plastic Surgeons Real Self Top 500