>>1374799That is true, but I'd assume Japanese cup sizes for Japanese girls.
...but it's all based off of the same theory, Overnipple measurement versus ribcage measurement. Seeing as how you're working from standardized inches or centimeters, you should be able to convert said numbers to whatever bra measurement system suits your fancy.
Of course, If there were an "Average ribcage circumference", which could be calculated in proportion to body height, we could estimate cup size with just Bust Measurements versus Height.
