Scientific researchers have found that women with equally thick upper and lower lips are the most attractive. Accordingly, “Avengers” star Scarlett Johansson’s lips are said to have a perfect 1:1 ratio, along with British supermodel Rosie Huntington Whiteley.

Scarlett Johansson is said to have perfectly proportioned lips

Former Victoria’s Secret Angel Rosie Huntington Whiteley is also considered

to have attractive lips

On the contrary, actress Emma Watson is considered unattractive because her upper lip is thinner than her lower lip.

Emma Watson is considered unattractive because her upper lip is thinner than her lower lip

This finding comes from a study of 560 cosmetic doctors from 35 countries. They were asked to look at photos and choose those with the most perfect mouths. The study was conducted by doctor Paul Heidekrueger from Munich. Previously, he conducted research on the standard butt size and ideal ear position of white women.

This doctor believes that a 1:1 lip ratio can be considered the most attractive feature in women. The second most attractive ratio is that the lower lip is slightly plumper than the upper lip. However, according to the doctor, this beauty trend can change over time, just like fashion.