Hi, you can order more than one size hun and decide on the day. I am a 32 a/b and im also having 340 cc to achieve a d. I am tiny framed and my surgeon told me to go 300cc but i dont want to be disappointed so am going for 340 cc, he said that would make me a dd/e but most girls i have spoken to on here who have had 340 cc have ended up d/dd. hope this helps xxx my op is booked for 17th, only 12 days whoop whoop!! xx