The cup size ‘F’’ can be different depending on the brand as the brands that do not carry a DD, mean that F cup in a European brand can be equal to the Australian or UK E cup. Although an F cup is the same in theory, in practical terms one F cup in one brand could be a whole cup size different in another brand.
It’s important to note that as the back band increases so does the size of the cup. The F cup of a 16F is bigger than the F cup of a 12F. So in actual fact a 16F is 2 cup sizes bigger than a 12F. So, not all Fs are the same size. The size of the back band actually changes the size of the cup.
Finding an F cup in a mainstream store is almost impossible. In actual fact, at Brava an F cup is pretty average. Many women who believe they are a DD or E cup are more often an F cup because they have not been fitted correctly. We estimate that most women who visit Brava for the first time and tell us they are an F cup, most would be closer to a G or GG cup. But remember the bra band could be too big, so when we fit a smaller back band on our customers this decreases the cup size too so then the cup size then must go up to compensate.