Bra size help please!

[Sunnyfeet]

I'm currently wearing 34D - I've got a narrow-ish upper body and fullish boobs. I've done the leaning forward as suggested: I measure 30 inches under my boobs, and 37 inches over the fullest part when bending forward. Any suggestions?

30F?

Strewth!!!!!

YUp try a 30F to start with. However, how does your 34D fit at the moment?

Feels a bit too big all over, but if I reduce the cup size I end up with the "4 boob" effect, as a C cup is too small

You'll probably find it feels baggy on the cup because the back is too big. If you try a smaller back and bigger cup it should pull the cups closer to the chest. When it's too big on the back the band will ride up and the front will fall forward creating a gap in the cup.

Given that, you might want to try a FF too - its easier to spot too big anyway.

The gaping is probably due to the band