750cc Implant Size After Double Mastectomy

This is a very commonly asked question.  It is hard to predict what cup size you will be without knowing your chest circumference, your proportion (height and weight), and bra manufacturers.  As you know, each bra company has slightly different sizing.  If you like the size of 750cc tissue expander and you have a large frame, 750cc or slightly larger implants should be okay with you.

Your question is a difficult one to answer without a physicial exam of your chest wall width and overall chest anatomy.  It is not uncommon to use larger volume implants to get you a body proportionate look.  Don't get caught up with cup size and cup size is not standardized and varies by designers.   Your reconstructive plastic surgeon will do his/her best to get you the size you are seeking if anatomically possible and safe.