What is the gonial angle?
The angle at the corner of the jaw, how it is measured on a profile photo, and what it does to jaw definition.
By Faciem research · 2026-09-06 · 4 min read
Definition
The gonial angle is the angle between the ramus (the vertical part of the lower jaw) and the mandibular body, measured at the gonion.
Normal range
Adults typically measure between 115° and 130°. Lower angles read as a squarer, more defined jaw; higher angles as a softer, longer face.
What changes it
The bone does not move without surgery, which we never recommend. Body-fat percentage, submental fullness and posture change how sharply the angle is seen, and those are in your protocol if they matter for you.
measurements · 4 min read
What is canthal tilt?
The angle of the line from the inner to the outer corner of the eye, and what a positive or negative tilt does to how the eyes read.
measurements · 5 min read
What are the facial thirds?
The three vertical zones of the face, the classical ideal, and why hair and brows change the proportions people perceive.