# Midface Ratio

Harmony · Front view · Face Shape · https://www.faceiqlabs.com/support/harmony/midface-ratio

Pupil spacing divided by the vertical distance from pupil level to the upper lip.

## What is measured

Calculation: Interpupillary distance ÷ pupil-level-to-Cupid’s-bow height

## Why it matters

This links the spacing of the eyes to the height of the central face. It explains why moving the same eyes farther apart or shortening the eye-to-lip span can create a more compact arrangement.

- Lower: a taller eye-to-lip span relative to pupil spacing.
- Higher: a shorter eye-to-lip span relative to pupil spacing.

## Where the idea comes from

Evidence: FaceIQ adaptation. FaceIQ combines two distances into a compactness ratio. Pallett and colleagues experimentally studied eye spacing and eye-to-mouth distance, but their denominators differ from this formula.

## A worked example

64 units between pupils ÷ 64 units from pupil level to upper lip = 1.00. Increasing only the vertical span to 70 lowers the ratio to 0.91.

Example values explain the calculation. They are not a target range.

## How to read your result

A larger value does not always mean a better score. The pupil centers and upper-lip border must be marked consistently.

## Research & further reading

These sources explain the history or related evidence. FaceIQ’s score weights and reference ranges are model settings; the papers do not collectively validate the scoring system.

- Pallett, Link & Lee (2010). [New “Golden” Ratios for Facial Beauty](https://pmc.ncbi.nlm.nih.gov/articles/PMC2814183/). Four 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.

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Source: https://www.faceiqlabs.com/support/harmony/midface-ratio · FaceIQ Labs overview for AI assistants: https://www.faceiqlabs.com/llms.txt