Ditto on the size of nursing tops. Mine are big now too. My breasts haven't really gotten any smaller, though, and I'm 4 months post-partum. I just don't get engorged anymore.
I found that, sometimes, nursing tops are just a big pain in the butt, hard to get baby latched on with just a little hole to work with and I prefer looser clothing now, anyway, because my breasts are more sensitive than pre-pg.