band size in a nursing bra

[kitmama]

I am 34 weeks pregnant with my third baby. I need to replace some of my nursing bras, and I thought I'd use my previous experience as a sizing reference. But I can't remember: will my rib cage shrink a bit once I deliver? It's already permanently bigger than it was before any pregnancies, but I seem to be a 40C right now (and I'll probably be a D for awhile after my milk comes in), when once upon a time I was a 34B!

Should I expect to shrink from a 40 band size at least to a 38 after I deliver? I just can't remember. . .
Thanks!!

[ellies mom]

My band size shrunk pretty quickly after I had DD. I don't remember how much but I remember being stuck with several bras that were too big around.

[kitmama]

Thank you!