Facial Proportions: Nose, Mouth, Brows, and Forehead
Facial proportions compare features with one another. A ratio tells you what was measured and what it was measured against, which is more useful than describing a feature as simply too big or too small.
Why the denominator matters
A nose ratio can mean different things in different apps. A result is only interpretable when you know both distances in the calculation. Look Maximize’s main nasal ratio uses a fixed inner nasal mesh span divided by the inner-eye distance.
That mesh span is not the outer nostril width. The mouth ratio uses mouth-corner width divided by the same fixed nasal mesh span. A change in the denominator can therefore change the ratio even when the mouth-corner width stays similar.
- Eye spacing: inner-eye gap divided by average eye width.
- Nose ratio: fixed inner nasal mesh span divided by inner-eye gap.
- Mouth ratio: mouth-corner width divided by fixed inner nasal mesh span.
- Brow height: eye-center-to-brow-centroid height divided by eye width.
How the forehead measurement works
A facial mesh does not automatically provide a reliable visible hairline. During review, you confirm the central hairline or mark it unavailable. The forehead ratio uses that confirmed point with the inner-brow line and chin.
Hair, cropping, and an unclear central hairline can leave this category unavailable. The app then reports a possible overall score range instead of inventing a forehead measurement. A mesh forehead point in More measurements is a different landmark and must not be read as the hairline.
Forehead ratio = 2 × hairline-to-inner-brow height ÷ inner-brow-to-chin height
Target ranges versus model reference points
The main categories show the selected preset’s comparison bands. More measurements includes descriptors such as projected jaw-to-cheek width, eye opening, and vertical feature positions. Those use points from a projected canonical face model where a reference is available.
A band is an interval; a model point is one reference value. Neither is a clinical normal range. Your marker and the displayed difference show how the measured photo compares with that specific reference.
Why a golden ratio is not the whole answer
An app cannot explain every face by finding one number repeatedly. These measurements use different landmarks and denominators because spacing, width, vertical position, and mirror difference describe different relationships.
Look Maximize publishes its category weights and formulas. The overall result is an experimental comparison with those declared references. For understanding a specific feature, start with the measurement itself rather than assuming every ratio should equal the same constant.
Comparing two scans
Use the same preset, camera, distance, and expression. Compare reports with the same measurement and scoring versions. A different preset can change the reference bands while leaving your measured geometry unchanged.
If a category is unavailable in one result, compare the available measurements directly. A partial score range and a complete score are not interchangeable.