I have 450cc implants. I'm wanting to go to 550cc. Should I? (Photo)

Thank you for the question. Keep in mind as you are thinking about your goals that sometimes adjustment of the breast implant pockets (capsule adjustments) may be necessary to achieve the outcome you are looking for. Also keep in mind that there is no accurate/reliable/predictable correlation between size/profile breast implant utilized and cup size achieved.  

Generally speaking, the best online advice I can give to ladies who are considering revisionary breast augmentation surgery 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. I have found that the use of words such as “natural” or "up a cup size” or "DD cup" etc means different things to different people and therefore prove unhelpful.
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup size may also be inaccurate.
3. Once you feel you have communicated your goals clearly, allow your chosen plastic surgeon to work with you in determining the best plan to achieve your goals.

I hope this, and the attached link (dedicated to revisionary breast augmentation surgery concerns), helps. Best wishes.

Ultimately,
only you can decide what implant size you are comfortable with. From the photos you appear to have a very
nice result from your original surgery. It may not be worth going through another surgery and the expense to
increase to a size which is disproportionate to your frame and may end up
looking too large. I would recommend
discussing this with your board-certified plastic surgeon before making your
decision. Best of luck to you!