I'm 5'4 a 140 Lbs Currently 36b How Big Would 450cc Make my Breast?

Thanks for your post. The choice for a certain breast implant size is always a very personal choice in which your plastic surgeon can guide you. If you're having second thoughts about your breast implant size you should discuss these with your surgeon before the operation. Best wishes.

Without an exam it is really impossible to say. My best guess would be that your cup size would increase 2 - 2 1/2 cup sizes. good luck.