The whole "cup size" thing is so weird. Even the name "cup" makes it sound like it's based on volume, but it's not. It's the difference between a measuring tape wrapped at boob height vs a measuring tape wrapped just below the boobs. This means that a 36A and a 28E might have the same volume of breast tissue but wildly different "cup sizes". It really seems like the whole thing would be a lot easier to manage if there were just a "breast volume" measurement and a "band length" measurement.