Harmony · Front view · Jaw
Jaw Frontal Angle
The angle relationship between the left and right lower jaw borders seen from the front.
What is measured
The calculation
180° − angle between the two gonion-to-chin-border directions
Front view / Measurement guide
Follow the measurement
Dots mark the landmarks. Lines show how the measurement is taken.
Why it matters
It describes lower-face taper rather than jaw width alone. A change in chin width or the height of the jaw corners can change the direction of these borders.
- Lower: more steeply descending jaw borders in this construction.
- Higher: flatter lower-jaw borders in this construction.
Where the idea comes from
FaceIQ adaptation
This is a FaceIQ landmark-based description of facial shape. The linked research provides background on facial measurement or perception; it has not directly validated this exact formula or its score. [1]
A worked example
If the angle between the two directed jaw-border segments is 90°, the reported supplementary angle is also 90°.
Example values explain the calculation. They are not a target range and are not measurements of the schematic above.
Research & further reading
The sources below explain the history or related evidence. FaceIQ’s score weights and reference ranges are model settings; these papers do not collectively validate the scoring system.
[1] Farkas et al. · 2005
International anthropometric study of facial morphology in various ethnic groups/racesDocuments variation in facial dimensions across sampled populations. Descriptive measurements explain variation; they do not establish an attractiveness score.