Harmony · Front view · Mouth
Cupid's Bow Depth
The vertical drop from the marked upper-lip peak to the central dip of the Cupid’s bow.
What is measured
The calculation
(Central-dip y − upper-lip-peak y) × photo scale
Front view / Measurement guide
Follow the measurement
Dots mark the landmarks. Lines show how the measurement is taken.
Why it matters
The central dip shapes the upper-lip outline. Its depth describes a local contour that can differ even between lips with the same overall height and width.
- Lower: a shallower dip at the center of the upper lip.
- Higher: a deeper dip relative to the marked lip peak.
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 12-unit vertical drop at 0.2 estimated mm per unit gives 2.4 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] Gibelli et al. · 2015
A Quantitative Analysis of Lip Aesthetics: The Influence of Gender and AgingMeasured lip area, volume and thickness across sex and age groups. This describes lip morphology; it does not establish a universally attractive lower-to-upper lip ratio.