What size maternity bra should I be buying?

[Starlite]

I would also recommend buying a few cheapies for now, and buy new ones as you need them. I went from a 12B to currently wearing 14C, when i fell pregnant they grew, my milk came in, they got even bigger, once BF was established they went back down.

[Ladylove]

Thank you so much everyone, this is very helpful.

[Kirley64]

I was a 10B before DS... within the first tri i had the same problem very sore boobs and i also went up a little bit so i bought wirefree but normal bras in a 10c. when my milk first came in i went up to a 10D and i bought one in that size but at home i lived in bfing crop bras and the triangle ones (from kmart). Found them easier at home. Then once i settled down after a few weeks i went back to a 10c however you can only get expensive bras in that size for bfing from specialised places i had to settle for a 12c. I couldn't justify spending that amount of money for only a few short months. so i lived alot in the crops.
From when my son was about 12months old i have gone back to being a 10A!! and i'm still feeding and i'm that size... which totally sucks to get bras now! i'm in kids crop tops! sad ....

i have splurged and bought a bra from Intimo in a 10B so far for this pregnancy cuz i think in overall time i spent the most in that size (from about 5month -12months old). hope that is some help.