Implant size? Is 300cc a good size to keep?

Thank you for the good question. Unfortunately, online consultants will not be able to provide you with specific enough advice to be truly helpful. Ultimately, careful communication of your goals (in my practice I prefer the use of goal pictures, direct examination/communication in front of a full-length mirror, and computer imaging) will be critical.

Generally speaking, the best online advice I can give to ladies who are considering breast augmentation surgery ( regarding breast implant size/profile selection) is:

1. Concentrate on choosing your plastic surgeon carefully. Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. Ask to see lots of examples of his/her work. Sometimes, if in doubt, it is helpful to meet with a few well experienced board-certified plastic surgeons.
2. Have a full discussion and communication regarding your desired goals with your plastic surgeon. This communication will be critical in determining breast implant size/type/profile will most likely help achieve your goals.
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. For example, I have found that the use of words such as “natural” or "C or D cup” etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on him who makes the bra; therefore, discussing desired cup size may also be inaccurate. Again, the use of computer imaging has been very helpful during the communication process, in our practice.
3. Once you feel you have communicated your goals clearly, allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals. Again, in my practice, this decision is usually made during surgery, after the use of temporary intraoperative sizers.
I hope this (and the attached link, dedicated to breast augmentation surgery concerns) helps. Best wishes for an outcome that you will be very pleased with.

There is no way to reliably pick which implant is right based upon your measurements alone and implant "CCs." Many things such as your skin quality, breast width, skin elasticity, existing breast tissue, chest wall shape and implant size and implant fill all contribute to your ultimate "look" after augmentation.
No physician can predict what each implant will do on your body until they are "sized in surgery." However, cup size is traditionally very inaccurate measurement scale (you likely wear different cup sizes in different manufacturers now).
The best way to achieve the look you want after augmentation is first a consultation with a board certified plastic surgeon and adequate communication with your surgeon. This is accomplished through the consult, exam, measurements, anatomic assessment and then in-office sizing. We also encourage patients to bring in photos of the "look" they are trying to achieve. Once all of this has been accomplished, the patient needs to put their trust into their physician to make the "best choice" of likely imperfect options. Then, you will get your "version" of your ideal outcome.
Best of luck,Vincent Marin, MDSan Diego Plastic Surgeon