The length-width ratio of an ideal oval face is 34∶2 1. The upper part of the melon face is slightly round, and the lower part is slightly sharp, which looks like melon seeds, also known as oval face. Among many face shapes, the oval face is the most beautiful one.

According to the golden section rule, the face is divided into upper, middle and lower parts, each of which accounts for 1/3 of the golden section. The labial midline divides the lower face 1/3 into two parts 1: 2, and the average face length is 182- 186mm, which is divided into five equal parts according to the eye width.

Extended data

Nowadays, on the basis of "three courts and five eyes", a more accurate standard has emerged, and all parts meet this standard, that is, beauty, as follows:

The width of eyes should be 3/ 10 of the same horizontal face width, and the length of chin should be1/5 of the face length; The distance from the center of eyeball to the base of eyebrow should be110 of face length, and the eyeball should be114 of face length. The surface area of the nose should be less than 5/ 100 of the whole face area, and the ideal mouth width should be 1/2 of the same face width.

Reference link? Baidu encyclopedia-three courts and five eyes