Sizing breast implants

 The right implant for your body depends on it matching in diameter to the base width behind your breast and having the profile for the "look" you want.  Moderate profile implants are the natural ones and moderate plus have some excess fullness in the upper pole and the high profiles are fuller still.  Generally, a moderate profile implant of the right diameter for you will give you a natural results somewhere in the ballpark of a C.  There is about a 50cc difference in what an implant on you will look like in you.  So to mimic a 325, I would look at a 275 in a sports bra.