hiya kassandra, in think we have spoken before, im sure 525s will be lovely and big for you, all depends on what you are pre op for eg im size 14 5ft7 and was a 36b i had 560 and im6weeks on tuesday, i measured a 36ff in la senza and appear to be an E/F in other shops, however i dont look as big as that at all as im quite broad shoulderd.
at first i hated my boobs, thought they were way too small for me, i love them now
so im sure 525s will take you to a nice big size 
good luck and keep us all posted 
xx