I was an empty 34b after breastfeeding and had 650cc high profile partials, I fitted in a a 34G bra in New Look at 5 weeks post op.
I am guessing with your size and the fact that they’re extra high you should achieve this, but your surgeon will tell you – if anything they are wrong in the size for the better, for instance my surgeon said I would be a DD/E, so he was 2 cup sizes out – but I’m not complaining! xx