The sizing isn’t n cup sizers in cc u an give Ur surgeon an idea on cup size u would hope to achieve, but surgeon will suggest wat will fit n suit Ur frame, u also red to decide what projection u want most ppl have high profile which are narrower but sit further out moderate plus which are wider or ultra high which I think in a big implant achieves motel fthe faker look x decide wether u want natural or fake looking aswell and Ur surgeon will given sizers to try and u pick which u prefer xx