Are 275cc Silicone Implants Large Enough to Get C Cups?

SEE VIDEO BELOW FOR SIZING TECHNIQUE:
Generally, it is my impression that this will not achieve the cup that you desire.
I strongly advise patients to try sizers with desired bras. You can do this in your physicians office or using sizing techniques discussed elsewhere or with commercially available sizers.

It really depends what cup size you are now. As a rough rule of thumb, 200-225cc will increase you by approximately one cup size. But this also varies based on your current breast size and body habitus.