I've been wearing a 34B for years. I have no idea why, really, I think I was measured at New Look or something?!
Anyway, I went to Bravissimo. She measured me. She commented that my boobs are a lot fuller with a bra on, so measured me again. She recommended a 32D. That felt a bit tight, but I stuck with it.
DP bought me a 32DD today, and I'm bursting out of it. Literally. If I move my arms at all, my nipples escape and bounce around.
Bravissimo lady did suggest that I go down to a 30 back eventually, but that was just too tight and uncomfortable at the moment, so we've compromised at 32.
This means that the cup size is too small though, surely? So I need to go up again?
I feel impossible.