Size is based on many factors....

I certainly agree with everything that Dr. Rand says however I also believe that it is vitally important to consider what you want. Your question seems to be asking if a C is the right size for you.

An experienced breast surgeon should be able to show you pictures of women who are similar height and weight and with different sized implants. This is vitally important for you to review in order to decide what it is that you are looking for. While you can always have your surgeon use breast/chest wall measurements to get the "best" size implant for your body, once you have that information it is always easy to go slightly bigger or smaller.