Admittedly - I have not had my baby yet, but this bra is just about 1/2 cup size larger and it will be perfect when the baby arrives and milk comes in. Truthfully, I could wear it fine now and no one would be the wiser (and it would still be comfortable). You can tell they are made to still fit when you expand.
I am normally a DD and I ordered F/G thinking it would be perfect and I was right! I am so excited to already have a comfortable nursing bra (actually two - ordered in black and nude).
Only rated 4 stars because I would like to see how it holds up when nursing, but the clasp was very easy to slip on and off.