Whats the Right Breast Size Implants for a Really Petite Girl. Recommendation over 400cc

implant volume changes depending on chest diameter.

to change from an A cup to a C cup usually requires the following:

36    375 cc-400 cc

34   325-  350

32    275 -325

the profile of the implant will also change the diameter 

high profile may be better for a more narrow chest unless the patient wants a very round appearance.

Judging by your height and weight and your own personal goals for breast augmentation implants of 400 cc or greater will probably be too big. It would be helpful for you to consult with a surgeon who will use external sizing implants in a snug fitting sports bra to help you describe the size you would like to be postoperatively. After that measurements should be taken to help decide what size implant would be best to safely accomplish your goals. Good luck

This all depends on a variety of measurements of your original, pre-surgery body contour and your desired outcome. A variety of variables are considered, including your height, weight, breast width, breast height, distance between nipple and breast fold, as well as your desired cup size to determine the most suitable implant size, type and specific surgical technique. Based on all of these measurements, you can then determine how many cc's would look natural, or unnatural. Best of luck!