revision, scarring, sizing increases

I would like to know if anyone can give an opinion as to what the approximate scale of size increase with a high profile silicone under muscle implant witha 50 cc increase and 100 cc increase.  I have been told that 100 is half a cup increase and also that 100 cc is more than a half cup (3/4 cup bigger).  I am getting revision only two months after lift and augmentation and would like to be about a half cup size bigger.  I currently have 275 cc and am a medium C but would like a full C cup. Since it is only two months ago, I am thinking that I will also get smaller so must consider that as well. Also, can anyone tell me if two months is too soon when the swelling is about 95% gone?