If you want to do your PhD field in that topic (great choice!) you would want to contact international bra-manufacturers and brands for their anonymized sales data. And of course let them sponsor your research. Then you sort out the bra sizes according to cup size and width, as lots of people pointed out it's a big difference having a (euro cup) 70 D (skinny girl with big boobs) to 85 D or plus (fatty with flappy bacon-tits). Then you need to exclude the tourists from sales based on either surveys or CC data if possible. I'm sure for example that lots of foreign chicks who fly to NY, LV or LA buy Victoria Secret stuff just because they can't get it here, there bust size is gonna mess up your data set.
Anything else is just fucking around, of course there is a correlation between BMI and bra size, but it's neither constant nor in any way measurable. From a statistic standpoint, you could have 30% obese people and all of them sport A-cups, while the rest of the female population is divided between B and G...and you'd still get your average C or D crosscountry. Even though it would be a dream country of 30% neglectable fatties with small tits and 70% busty slim chicks![[Image: wink.gif]](https://rooshvforum.network/images/smilies/wink.gif)
Anything else is just fucking around, of course there is a correlation between BMI and bra size, but it's neither constant nor in any way measurable. From a statistic standpoint, you could have 30% obese people and all of them sport A-cups, while the rest of the female population is divided between B and G...and you'd still get your average C or D crosscountry. Even though it would be a dream country of 30% neglectable fatties with small tits and 70% busty slim chicks