Implants don't actually come in cup sizes. Although, I have a lot of
patients that tell me their surgeon put a C-cup breast in, for example. Cup
size is relative to body size and is actually determined by measuring
around the rib cage and comparing that to the measurement around the
fullest part of the breast. Bra makers are also very different, in that,
it's really difficult to guarantee any specific cup size, even if a patient
has a specific desire before surgery.

A lot of doctors just assume that patients want the largest, most full
breast possible. Many patients do, however, want a natural result, so I
think it's most important to communicate with your surgeon about the
clothing styles you like to wear and how obvious you want the breast
augmentation to be to other people before you start thinking about size.

A lot of surgeons will let patients choose their own implant and I don't
necessarily think this does the patients any favor. Choosing too large an
implant can lead to problems like stretch marks, nerve damage, lowering of
the breast on the chest wall, and implant displacement out to the sides.
Choosing an implant based on the width of your breast, as well as the
quality of your breast skin and current breast tissue, can mean a better
and long lasting result.

To choose the right implant for a patient I measure the width of the
breast. For that same width, there are generally several different sizes of
implants. Some which are very natural in projection and some which project
more. Based on the size the patient wants, we can choose either a larger or
smaller size within that range but all of them will fit on the patient's
chest and give them a natural result.

What Size Breast Implant Should I get?

Doctor Dana Goldberg discusses what factors go into choosing the ideal size for breast implants.