Harmony · Side view · Jaw
Gonion-to-Mouth Line
The vertical difference between the constructed jaw corner and the mouth corner.
What is measured
The calculation
(Constructed gonion y − mouth-corner y) × photo scale
Side view / Measurement guide
Follow the measurement
Select a label to focus on its line. Select again to show all measurements.
In these guides, nasion means the nasal root, subnasale the nose base, and pogonion the most forward chin point. Frankfort refers to the direction from the ear-opening landmark to the lower orbital landmark.
Why it matters
It locates the jaw corner within the height of the face. Two jaws with a similar corner angle can have different vertical positions relative to the mouth.
- Negative: the jaw-line intersection is above mouth-corner level.
- Positive: it is below mouth-corner level.
Where the idea comes from
FaceIQ adaptation
This is a FaceIQ photographic construction. Clinical profile analysis provides context, but the cited work does not validate this exact landmark formula or its scoring range. [1]
A worked example
A jaw intersection 10 units below the mouth corner at 0.2 estimated mm per unit gives +2 mm.
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.