I had 425/450 from 36B. It took me to 36E. In my opinion you should be about 34E-F with 450 and 34F-FF with 500 which is a lovely size, big but def. not massive. I would go for 500 🙂 Hope it will help 🙂 Good luck!
People have been saying theirs have grown after they have had their op and had a lot of stretch marks which has put me off going for that’s size I might give them an email tomorrow and change to a 450cc x