Either 375cc or 400cc would likely provide a nice result, but many factors are involved in the selection of the implant type and volume. The current width of your breasts, the width of your chest wall, and the quality of your tissues all influence the decision. There is a range of implant volumes that can be appropriate for your body, and your own desired appearance then plays a role in determining which implants within that range will help you to achieve your desired look. You should make sure that you and your surgeon communicate well, so that your surgeon has a good concept of your goals. The surgeon can then guide you as to the implant decisions. I will generally take more than one implant size to the operating room, then insert a sizer or trial implant at surgery to confirm how well that particular implant volume accomplishes your goals for appearance and size. I can then make minor adjustments during the surgery if needed, selecting an implant that most closely gives you the look you want. It takes a few more minutes this way, but it results in almost no patients who feel that their size is unsatisfactory, or who seek to change their volume. Good luck!Dr. Andres Taleisnik