I’m looking to get a breast augmentation and was recommended 300cc on left and 350cc on right. Any suggestions?

Dear kimanier, Thank you for your photos. I think you are a great candidate for a breast augmentation. One can appreciate the asymmetry from your photos so i think the difference in implant sizes is reasonable. This is a common practice to achieve more symmetry in certain individuals. The volume is based on many factors and I assume your plastic surgeon took specific measurements to help you choose reasonable volumes based on your body anatomy. If you think this may be too small, then talk to her/him and explain your goals. I think communicating will help you feel reassured that your end result will be met. Make sure she or he is a board certified plastic surgeon. Good luck, Dr. Suzette MirandaBoard Certified Plastic Surgeon

Patients often think in terms of cup size when considering augmentation. Unfortunately, devices are sized in terms of milliliters (cc) of volume. This can lead to some confusion when sizing. Additionally, it is important to remember that cup size itself is not standardized with variations from one manufacturer to another. Unfortunately, as many women can attest their cup size in an industry leader such as VS is not necessarily transferable to another brand.
Another point which is often under appreciated is that of anatomy and starting point. Any implant will add volume to the volume which is already present. The implant is additive. A particular volume will not necessarily confer the same cup size to different patients (often times it will not even confer the same cup size to different breasts in the same individual...remember they are "sisters" not "twins"). 
A general rule of thumb is that 125cc can represent somewhere between 1/2 to a full cup size increase. Smaller volume differentials (25-50cc) are typically less consequential representing a volume change of less than a shot glass. However, I have found these numbers, at least anecdotally, to be of little help. Patients often present with notions/goals which do not correlate with these sorts of sterile volumetric assessments.
When sizing patients, there are a number of useful tools including:
-3D imaging (has the added benefit of offering a volumetric analysis of the pre-operative breast)
-Breast sizers (rice bags)
-Goal photos
I also recommend that patients commit to a particular look rather than a cup size. Once a patient settles on a look that pleases them the overall cup size increase becomes less relevant.The key to obtaining a natural result is to stay within the parameters defined by your BWD. With regards to your specific question, your current choices do not sound unreasonable (however, this is difficult to say with any certainty without an in-person exam). You demonstrate mild asymmetry (which is within the normal expected limits of variation). The difference between 300 cc and 350 cc will be subtle (slightly more than the volume of a shot glass).
As always, discuss your concerns with a board certified plastic surgeon (ABPS).

Thanks for your inquiry and excellent pictures, first by looking at your wish pictures you should be considering a high profile implant. Otherwise you seem to be in a good size range, good luck.