I followed the rules and the bloody bras don't fit still!
So I measure 39.5 inches under my boobs and 44.5 over the widest part. I bought a 40E from M&S (just an non underwired one) and it rides up at the back and cuts into my shoulders.
I am still getting reflux problems whenever I wear a bra and I am getting annoyed.
I am tempted to buy an £100 one from Rigby and Peller just so I can get measured correctly! Not that I can afford it but I am starting to have to go braless to be comfortable and that isn't good with a chest my size :(