stylistic:tone
Craniometry

The cephalic index is the ratio of the width of the head, multiplied by 100 and divided by its length (front to back). The index is also used to categorize animals, especially dogs and cats. The width is usually measured just below the parietal eminence, and the length from the glabella to the occipital point.

Humans may be:

The vertical cephalic index refers to the ratio between the height of the head multiplied by 100 and divided by the length of the head.

Humans may be: