A study published in the journal Evolution and Human Behavior claims that the size and firmness of women’s breasts dictates how attractive men find them.

The study involved 267 men in Brazil, Cameroon, the Czech Republic, and Namibia. According to the study, medium-sized breasts were seen as the most attractive in Brazil, the Czech Republic, and Namibia. People in Cameroon seemed to prefer large breasts.

“We found cross-culturally consistent preference for firm breasts which are typical for women in young adulthood,” the study’s lead author, Jan Havlíček from Charles University in Prague, told PsyPost.

“In contrast, we found a quite large variation in breast size preferences. In most tested countries the medium size breasts were the most preferred.”

To come to this conclusion, the researchers showed the participants images of different breast sizes, which the researchers say is a “marker of potential fertility”, and breast firmness, a “marker of residual fertility”.

“This pattern supports the idea that breast morphology may serve as a residual fertility indicator, but offers more limited support for the potential fertility indicator hypothesis,” said the researchers.

“Future studies should focus on a potential interaction between the two parameters, breast size, and firmness, which, taken together, may help to explain the relatively large variation in women's breast sizes.”

Well, there you go.