Is 300cc too Big for my Frame?

Hello. It is hard to give a definite answer without a consultation or at least pictures. For your dimensions 300ccs is safe and a moderate profile implant is a good choice if you are going for a more natural look. It is not uncommon to get nervous about these types of things before an operation. Try not to get too worried and be sure to bring any concerns to your doctor’s attention for reassurance before the surgery.

Jaime Perez, MD
Breast Augmentation Specialist
Plastic Surgery Center of Tampa

In short the answer is no.  The BWD of a midrange silicone implant from Allergan of 304cc is 12cm which is the same for Mentor. I do not have the chart in front of me for a Sientra implant but I bet it is close to the same.  If you are really a AA cup you need to maximize your implant width. I would recheck the numbers you have.

It is normal to feel some concern prior to undergoing any surgery. Based on your anatomy, it doesn't sound like a 300cc implant will be too big for your frame, but it sounds as though you still have concerns. In our office we use 3D imaging which allows you to virtually "try on" different sized implants to see how they will look on your body. Many patients find this helpful in determining the best size implant for their own goals.  There is always a question of anatomy, and sometimes size changes are made during surgery based on what fits and looks the best based on prior discussions with the patients. Good luck to you.