How Many Cc's Do I Need to Be a C-cup? (photo)

A 38B is equivalent to a 36C.  A 300 cc augment should increase you by at least a cup size.  Having been swollen, you became accustomed to a larger look than you requested preoperatively.  If you remain unhappy, three months down the road, you could consider a reaugment with larger implants but I would encourage you to take a look at your preop photos being jumping to conclusions.

There are no fixed standards for cup size.  Many of my patients have B's C's and D's in their bra drawer all (or occasionally none) of which fit. 

A B cup on a 36 inch band is larger than a B cup on a 34 inch band, and smaller than a B cup on a 38 inch band. I cannot imagine why your measurement went from 36 to 38. That measurement is based upon the diameter of the chest at the level of the breast fold, and that should not have changed with implants. 

The sizing discrepancy may well be due to that. The B cup on the 38 is larger than the B cup on the 36. It can be a full cup size or more.

Usually a 200 cc implant will give a one cup size increase. 

Thanks for your question, best wishes.