Is there a noticeable visual difference between 455 and 480cc UHP Mentor?

There is only a subtle difference between the two breast implant sizes that you mention but if you are increasing your size, I would consider the larger of the two. My experience is that when someone is choosing between two sizes AND they are in the process of exchanging for a larger implant, they are usually happier with the larger size. Talk with your plastic surgeon, though, and explain exactly what you desire. Everyone is different and your results need to be customized to your goals and body type. Good luck!

Nope. 25cc is less than one ounce. Even those of us who do this surgery every day would be hard-pressed to see that little of a size difference. At the end of the day, all patients must rely on their plastic surgeon to make the final decision on implant size depending upon the needs at the time of surgery. Best of luck with your surgery.