5’7, 110lbs, small framed, center of nipple to the other is about 7 inches. 300cc or 330cc for a C cup? (Photos)

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.
With regards to your specific question, I would not struggle over small variations in size. 30 cc represents less volume than a shot glass and is unlikely to make or break a result.
As always, discuss your concerns with a board certified plastic surgeon (ABPS).

After I measure and discuss goals with my patients, we then look at pictures of women (my patients) with similar measurements with different size breast implants. They also get to see what they would look like when the breasts have fully dropped and fluffed and in clothes. You get to see actual results and the surgeon' s experience and not a virtual idea of what can be achieved. Women tell me that this process is very helpful in determining what is right for them. Dr. Ted Eisenberg, Board Certified Plastic Surgeon and Author. RealSelf Distinguished Hall of Fame Inductee. Philadelphia, Pa., USA

I encourage you to return to your surgeon's office to discuss implant selection. Many have sample implants you can "try on" to give you an idea of how you may look after surgery. If you felt the 350cc implant was too large you may want to lean toward the 300cc implant if you want a more conservative look. Because you have more minimal breast tissue, the volume of the implant is similar to what you'll have after surgery.

Unfortunately, you have not told us your bra size. If you are size 32 or 34, each 100 cc of implant corresponds to 1 cup size change. If you are size 36 or 38, each 200 cc of implant corresponds to 1 cup size change. From this, you can determine the amount required to achieve your desired goal.

Best Wishes,

Gary Horndeski, M.D.

Thank you for sharing your question and photographs. I would recommend either seeking additional consultations that fully inform you of your treatment options, and can give you the option of trialing various sizers in various profiles to provide you the best visual demonstration of what your outcome may approximate.