Ugh, I'm so uncomfortable with mine and I am not really even THAT big, and don't hurt or leak. I just much prefer them to be smaller and am hoping that I get the shrinkage I did while nursing DS (after a few months I went down below pre-preg size and that was fine by me.) I'm holding off on buying nursing bras until after the baby is here -- my old ones say 40F! And when they were too big I was too lazy to buy more (actually I just went back to regular bras when DS was 12 mos)
Right now I'm barely in a D, but bought 38 when I think I should have bought 36, I am so tired of bras that don't fit right!
BTW for those worrying, I don't leak, didn't while pg with DS either, didn't leak too long after he was born (or feel letdown pretty much ever), and had lots of milk (9 lb 3 oz baby that doubled his weight by 4 mos...)