Do you always expand?
I have many friends who have gone from being a 30/32 in a bra to 36 after pregnancy... and never gone back again.
however I'm already a 36 which is a wide ribcage for the rest of my body. looking at the rest of me you would expect me to be a 32.
so am I more likely to stay the same rather than going up even further to a 38/40??