I think a 304 cc implant will result in approximately a 2 cup size increase under your muscle. In order to make an accurate size recommendation, I would need to assess your chest wall and breast mound measurements and characteristics. Unfortunately, there is not a general rule of thumb or objective criteria to implant selection. Your plastic surgeon will perform several measurements of your chest wall and breast anatomy and determine a range of implants that both fit your chest wall and reach your desired goals. The next step is to try on this range of implants in the office with your doctor. The key to this success is showing your surgeon the body proportion you desire with a bra sizer and allowing your surgeon to guide you to the right implant. It will be much easier to communicate in implant cc's than cup size when determining the appropriate implant for you. I wish you a safe recovery and fantastic result. Dr. Gill
There are no fixed definitions of cup sizes. Many women have bras of three different cup sizes that all fit. Your idea of a C cup may not match that of your surgeon, or that of Nordstrom's and so forth. A cup on a 34 band is larger than a cup on a 32 band, and in turn smaller than the cup on a 36 band. I find that trying on implants in an excellent aid in choosing the size to be implanted. The implants look a bit larger sitting on the breast as compared to that same size in the breast, so I usually put in an implant 5 to 10 per cent larger than the trial size that looks best. Other surgeons have other sizing methods that work for them. It is often quoted as a guideline, that about 200-225 cc of implant will give a one cup size increase, but that is a rough estimate of limited reliability. When you ready for an in person consultation, RealSelf has listings of surgeons in your area. You should consider cross referencing the listings from the The American Society of Plastic Surgeons (plasticsurgery dot org). A listing in the ASPS website assures you that your surgeon is not only board certified, but also is a member in good standing of the major plastic surgery organization in the U. S. Thank your for your question, best wishes.
