Harmony · Front view · Mouth
Interpupillary-Mouth Width Ratio
Mouth width divided by pupil spacing, despite the order in the report label.
What is measured
The calculation
Mouth-corner width ÷ interpupillary distance
Front view / Measurement guide
Follow the measurement
Select a label to focus on its line. Select again to show all measurements.
Why it matters
It compares the horizontal scale of the mouth and eyes. It complements mouth-to-nose width by using an upper-face reference instead of the nose.
- Below 1: the mouth is narrower than pupil spacing.
- Above 1: the mouth is wider than pupil spacing.
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
A mouth 54 units wide with pupils 64 units apart gives 0.84. At 60 units of mouth width, it becomes 0.94.
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] Pallett, Link & Lee · 2010
New “Golden” Ratios for Facial BeautyFour experiments varied eye spacing and eye-to-mouth distance in face images. Preferences depended on feature arrangement. The tested ratios and stimuli do not validate every FaceIQ measurement or a universal ideal.