Will 500cc fit? I am petite 5'1" and 103lbs 32A but my breasts do not completely fill cups. My BWD was measured as 13cm

Thank you for the question. Online consultants will not be able to provide you with specific enough advice to be truly helpful. Ultimately, careful communication of your goals (in my practice I prefer the use of goal pictures, direct examination/communication in front of a full-length mirror, and computer imaging) will be critical.
Generally speaking, the best online advice I can give to ladies who are considering breast augmentation surgery ( regarding breast implant size/profile selection) is:
1. Concentrate on choosing your plastic surgeon carefully. Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. Ask to see lots of examples of his/her work.
2. Have a full discussion and communication regarding your desired goals with your plastic surgeon. This communication will be critical in determining breast implant size/type/profile will most likely help achieve your goals.
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as “natural” or "C or D cup” etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on him who makes the bra; therefore, discussing desired cup size may also be inaccurate. Again, the use of computer imaging has been very helpful during the communication process, in our practice.
3. Once you feel you have communicated your goals clearly, allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals. Again, in my practice, this decision is usually made during surgery, after the use of temporary intraoperative sizers.
I hope this (and the attached link, dedicated to breast augmentation surgery concerns) helps. Best wishes.

The best way
to determine the size that fits your personal perception of the perfect breast
is to try on sizers. This way you can see how they fit on you, how they add to
your current volume, and whether they fit your frame. Although the surgeon can
guide you, only you will be able to tell what is the right size. Try on sizers.
Measuring a diameter and then telling the patient what volume they can
have (in high, moderate or moderate plus implants) in my mind is backwards. The
patients should be allowed to choose the volume. Then the surgeon carefully
considers the base diameter, projection, profile, manufacturer, and fill
material that will achieve the patients goals of size as well as qualitative
look (natural, intermediate, or bold upper pole fullness or projection), all
the while taking into consideration the patient's anatomic features that will
affect the outcome. The experience of the surgeon and the degree to which
they explain the options to you is of utmost importance. The subtlety in the
final outcome is not achieved by which profile implant is used, it is
determined by the skill in the creation of the pocket, the choice of implant.
If you try sizers on and like the 500, that is the right choice. Don't let the
doctor tell you what would look good on you. They cannot tell what you perceive
to be the best size. There is no maximum. That is up to you.