I have lost quite a bit of weight (11st4 to 9st 11) and my bras no longer fit. For years I have been the hard-to-find size 32GG but now they do nothing for me.
So measured myself as per a MN thread and made it 30GG or maybe 30G... cue a lot of hunting in Brastop/Figleaves/Debenhams - turns out 30GG is even harder to find!
But finally I have had an epiphany - I no longer need the full cup style; in fact a balconette which never worked before now is the best fit! This is exciting because there are a lot more in this style available and they are so much nicer :)
I got such a pretty pink spotted one from Debenhams and a lovely mint tartan one from Brastop. They would never have worked on my previous boobs 
(sorry for long post but I can't really put it as my fb status!!)