A new study says that American women have the largest breasts in the world, with a mean breast size of 1,668 ml (that's the scientific "mean," not the slang "mean"). The study, published in The Journal of Female Health Sciences, analyzed data from nearly 400,000 women in 108 countries. It excluded women that have breast implants or that were pregnant or breastfeeding, so it's truly a measurement of naturals from around the globe.

Sources: International Business Times