Top 14 Countries Whose Women Have The Largest Natural Breasts In The World, by Rebecca Martinson.
Almost 400,000 women from around the globe were measured for the study, with Caucasian Americans coming in with the highest breast volume measuring in at larger than a D-cup. Even non-Caucasian Americans still beat out most other countries, ranking in at third place with around a C-cup….
[R]esearchers found that obesity did not play a large part in the relative size of breasts, with the average breast volume “found to be large regardless of body weight, with even athletic and slim women being large-breasted.”
From the The Journal of Female Health Sciences:
It has been shown that young women who come to the United States as exchange students have a very high incidence of mental problems related to their body image and self-esteem. In-depth interviews of the affected exchange students have revealed that one of the key reasons for the problems is that they feel anxiety, when they realize that their breasts are so substantially smaller in size than the breasts of U.S females.