Never establish your cup size with any tape measure! Go to a good store and collect three or four suitable sizes or patterns and go to the fitting room and try them on. Try not to muddle them - easy with limited space, so be organised. Having a best fit, so far, go and select some more. read more
Bra size charts go down to “A”, but the smallest bra cup size commercially made (without having it custom made) is a 28AA. There are companies that will make 24 or 26 bands as a special order. read more
For example, a woman who needs a 28-inch band to fit around her ribs, and a cup size that measures 28.5 inches or less at the fullest point, would wear a 28AAA bra. An AA cup bra would be 1 inch or less bigger than the band. read more
The smallest cup size available is AA, as it means there is a 0 inch difference between the ribcage and the bust. Not all AAs are the same size though, as the cup size is relative to the band size. read more