So I was recently remeasured at Bravissimo after having an inkling that my bras didn't fit, and I was put in a (perfectly fitting) 30F whereas I had been wearing a (badly fitting) 34DD.
I usually wear size 10/12 on my top half. Usually a 12 to be fair, although I think that's mainly to fit my boobs in. If it wasn't for them I reckon I'd be in size 8/10.
Size 8 - 10 is pretty common to wear on your top half. But hardly any shops start their bras at a size 30. I have a size 8 friend who wears a 28. Does that mean that lots of size 8/10 ladies are wearing entirely the wrong size bra?! Because otherwise surely there would be enough demand that more shops would start their ranges at size 28/30?! Or are they all shopping in Debenhams/Bravissimo like me?! Even M&S only have about 3 'adult' bras that start at a size 30, and not all of them go up to an F cup. (There is the 'teen' type range too, but unsurprisingly no F cups there......)
/rant over/ 