Is 425cc silicone implants too big for my size?

For your height and weight, a 425cc implant is on the large end of what would likely work for you, but that is a significant oversimplification.  In reality, choosing a size is based on many variables such as base width diameter, tissue elasticity, proportion to the lower body, and aesthetic preference (more natural vs more augmented) to name a few.  If you have a narrower ribcage, you will probably need a high profile implant in the 425cc range so it will not be too wide, but this will give you a rounder, more projected breast, which you may not like.I think you need to spend more time with your surgeon discussing profiles as well as sizes, and I recommend trying on in-bra sizers to see more accurately what you will look like after surgery.  There is no perfect size, but you should feel fairly comfortable with your final selection by the time you head into surgery.  Good luck!

Thank you for the question. 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, in bra sizers, and computer imaging) as well as careful measurements (dimensional planning) will be critical.***Given that your surgery is coming up soon, I would suggest that you spend additional time communicating your goals/concerns directly with your plastic surgeon, preferably prior to the date of surgery.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.
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 know words such as “natural” or "full C, small 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/video, dedicated to breast augmentation surgery concerns) helps. Best wishes for an outcome that you will be very pleased with.