There are two aspects to your question. The first one is easy: As Dr. Stratis suggested, try samples on and see what looks right. Forget about cup size because it is a very inconsistent measure of breast size and a C cup on one person may be a completely different look than on another.
Fill volume is a little bit trickier. The manufacturer's recommendation for a 300 cc implant is 300 to 330 cc's. However, some surgeons feel that at the maximum, the implants may still tend to ripple especially in someone petite like you with not a lot of body fat to conceal the implant. The trade-off with the fill volumes above that is that the implants may tend to be too firm and round.





