Debating 455cc or 480cc? I am 5’4” and weigh 115lbs.

I think using sizers in a sports bra is a good way to determine the look you are trying to achieve. It seems you really have to return to your plastic surgeon and work this out ahead of time, so you aren't dissatisfied.

Good day! For your guidance, here is a list of generalized breast implant sizing for most patients:
32A to 32C needs about 250-275cc34A to 34C needs about 300-350cc36A to 36C needs about 350-400cc It is best to find a size in proportion with your whole body. Contact your surgeon and discuss realistic goals and expectations when deciding which implants are the best for you. Best of luck! #RealSelf100

I would caution you against comparing yourself to others on realself. Even looking at women with the same height/weight as you will not provide a good guide to how you will look with a given breast implant because each woman is different. The big issue that I see is that it seems you haven't actually met with your surgeon, which may be the reason that you are confused about your implant size. Your surgeon should discuss this with you to help guide you to the right size for your body, it's not a decision that you should have to make on your own. I'd suggest booking an appointment with your surgeon to be examined and have your questions answered before moving forward with any procedures. Hope that helps! 

Good day and thank you for your questions.  Pictures would be helpful but I understand it is very personal to share pictures of breasts.There is nothing wrong in meeting a nurse to start the conversation but patients should always meet the plastic surgeon too, several days BEFORE your surgery.  The plastic surgeon is doing your surgery and you should have that discussion with him/her too.  Many things must be discussed and taken into consideration: types of implants with their pros and cons, planes of implantation (subglandular, subfascial, subpectoral), the "no-touch" technique, the Keller funnel, complications such as capsular contracture, ALCL (rare type of lymphoma so far seen only with textured implants), symmastia (a "unibrow of the breasts"), etc.As for sizing... I like to use "special" sizers in my office which mimic the final results very well, much better than regular implants or bag of water of rice one would put in her bra.  The sizers do not allow for "air" between the skin and the implants and quite a good approximate of the final results.Both implants you are looking at are very large for a petite person such as you, according to your dimensions.  Have you had children yet?  How is your skin envelop?  Skin elasticity?  What plane has your "nurse" discussed with you?Keep in mind that the bigger you go, the more complications you can have.  Unless you want something "less natural", I would go with the smaller size.But again, your surgeon should be available to help and guide you.Best of luck!Kind regards,Dr. Marc DuPere, aesthetic plastic surgeon

Sizing a patient with breast implants is an art as much as a science and depends very much on the experience of the surgeon.  Also, your wishes, tissues and expectations.  Do you understand the trade-offs of larger implants and do those trade-offs make sense to you.  I strongly recommend that you meet with your surgeon in person at least once and with enough time before surgery to feel comfortable with your choices.
As to sizing, Mentor has a sizing system of shells that you put into an un-padded bra that is very accurate in helping you to understand how different size implants will appear in clothing.   Your tissue dimensions and characteristics influence how large an implant is needed/desirable in your specific case.   You need to  have your questions answered by the doctor , and feel comfortable with the plan.  I meet with all of my patients for an in depth exam and discussion weeks before any surgery.  Better to have your questions and concerns addressed as much as possible before surgery rather than being surprised after.  Breast augmentation, more than many procedures is a process, not just a procedure.  You need to understand and have considered the specific trade-offs and choices in your case. This requires a meeting with your plastic surgeon.  

Thank you for your question. You are making a wise choice with the Ideal implants, particularly because your surgeon can have some flexibility in sizing during the surgery. A recent study estimates that one cup size is about 130-150cc. 450cc seems even a little big for your small frame, but you have to go for the look that you want or you will not be satisfied. Best wishes