Hi there-
There is, unfortunately, no standard volume implant that can be said to give you a certain cup size after surgery. Even with a good understanding of your height, weight, shoulder dimensions, etc, there is no reliable way to predict the most important variable when it comes to selecting an implant for any particular patient-- the elasticity (or stretchiness, if you will) of the tissues that will overlie the implant.
Think of it this way- if you had an identical twin with an identically shaped body, but who had led a different lifestyle and thus had skin and tissue elasticity that was different than your own, and you both received the exact same implants, the two of you would have a (possibly significantly) different outcome. The elasticity of the tissues is that important.
In my experience, the only good way to measure the interaction of the tissues with the implant is at surgery.
If this is not complicated enough, consider also that a woman's choice of bra is a very arbitrary decision, and will depend on where you like to shop, the manufacturer of the bra (a "C" cup bra at Victoria's Secret may be a different size than a "C" bra at Bloomingdale's), and whether you prefer to wear your bra tightly or loosely. Therefore, what you mean when you say you want a "C" cup may be very different than what another patient means....
So, how can you as a patient help your surgeon be most likely to achieve the outcome you want? Rather than worry about the letter on your bra, or even the number of cc's in the implant, spend some time thinking about WHAT YOU WOULD LIKE TO LOOK LIKE.
That's really what this is all about, right? If, after surgery, you have the appearance you wanted and can't pass a mirror without smiling, you're not going to care what letter is on your bra or what number is on your implant, right?
Help your surgeon understand what you would like to look like, and trust that they'll do their best to achieve the look you want for you.
As always, it is important that before you get to this point you've done your homework, and know that your surgeon has been to a good medical school, completed a quality residency training program in Plastic Surgery, is Board Certified by The American Board of Plastic Surgery, has a lot of experience doing this type of surgery (ask to see photos), is performing the procedure in a facility accredited by the AAAASF, and has a reputable anesthesia provider assisting them in surgery. You'd be amazed how many people assume that their surgeon has these qualifications just because they are advertising that they do this type of surgery, only to find out their "plastic surgeon" was an ER doctor or something.
BE CAREFUL, and be your own best advocate. Once you have a surgeon and situation you think you can trust, concentrate on communication the appearance you want. Your chances of achieving your goals will be greater.
