Jaw and chin · Side photo

Jawline slope

mandibular plane angle

Lower values mean a flatter jawline, higher values a steeper one. The Frankfort plane keeps head tilt out of it.

How it's measured

Angle between the lower border of the jaw (gonion to menton) and the Frankfort plane (ear canal to lower eye rim). Positive when the chin end of the border is lower.

Reference range

Male reference

15–22°

Female reference

15–23°

Source: Community facial analysis formula (public spreadsheet), top range: men 15-22°, women 15-23°.

In the score

Counts toward the score with weight 12.5 (Community formula point table: mandibular plane angle, 12.5 points).

What changes it

• Needs a true side profile with the ear opening and the lower eye rim visible, so the head can be levelled before measuring.

One number, one feature

One measurement describes one detail in one photo. Pose, lens and expression move it, and every reference range is an average from limited samples.