Hey
I had 505 unders and I’m now a 32g!!
I was naturally about a 32DD to 32E (depending on where i shopped!) before the BA but they had gone a bit droopy after having 2 children so the 505’s filled them out lovely and took me up about 3 cup sizes!
If i have them done again i would go slightly bigger as i got a bit of boob greed when the swelling went down!!
Hope this helps x