Measurements
The 16 facial measurements LookFlex reports
A LookFlex scan turns your selfie into sixteen numbers. Each page below explains one of them in plain words: what it compares, how it is calculated, what range is typical, how precise it is and what really moves it.
Eyes
- Canthal tiltThe angle from your inner to your outer eye corner, and what research does and does not say about it.Limited evidenceMen +2.0° to +7.0° · Women +3.5° to +8.5°
- Eye spacingThe gap between your eyes compared with the width of one eye: the classic 'one eye apart' balance.Limited evidenceScoring range 1.18–1.36
- Eye aspect ratioHow open your eyes are relative to their width, from narrow and hooded to round and open.Limited evidenceMen 0.22–0.30 · Women 0.24–0.32
- Brow-to-eye distanceHow high your brows sit above your eyes, and how much of it grooming can change.Limited evidenceMen 0.145–0.195 · Women 0.185–0.250
Proportions
- Eye separation ratioYour pupil distance as a share of face width: how much of the face width the eyes span.Limited evidenceScoring range 0.435–0.475
- Facial width-to-height ratio (fWHR)Face width compared with mid-face height, and why research finds it a weak guide to character.Limited evidenceMen 1.82–2.00 · Women 1.74–1.88
- Midface ratioPupil distance compared with the pupil-to-lip height: how compact or long the middle of your face is.Limited evidenceScoring range 0.98–1.09
- Facial thirdsYour middle third (brows to nose base) against your lower third (nose base to chin).Limited evidenceMen 0.85–0.98 · Women 0.92–1.04
- Face length-to-widthHow long your face is relative to its width, one of the four ratios behind face shape.Limited evidenceMen 1.14–1.25 · Women 1.13–1.23
Jaw and chin
- Jaw width ratioJaw width at the angles compared with cheek width: wider leans masculine and tapered leans feminine in styling convention.Limited evidenceMen 0.885–0.940 · Women 0.865–0.905
- Chin-to-philtrum ratioChin height compared with the space between your nose and upper lip.Limited evidenceMen 2.40–3.00 · Women 2.30–2.95
- Jaw definitionHow crisp your jawline reads: the corner angle plus the light-and-shadow edge under it.Limited evidenceMen 63+ · Women 55+
Nose and lips
- Nose width ratioNose width at the base compared with the gap between your eyes.Limited evidenceMen 1.20–1.32 · Women 1.14–1.27
- Mouth-to-nose width ratioMouth width compared with nose width, and why expression moves it so much.Limited evidenceMen 1.28–1.46 · Women 1.36–1.55
- Lip ratioLower-lip height compared with upper-lip height.Limited evidenceScoring range 1.40–2.00
How to use these pages
Start with the measurement you were curious about, or read them in order. Every page has the same structure: a definition, how LookFlex measures it, the typical and scoring ranges by sex, what research says, what influences it, safe ways to improve how it reads, common myths, how precise it is, and answers to frequent questions.
The scoring ranges come straight from the same calibration table the app uses, so what you read here is what your scan is scored against. If we ever change a range in the app, these pages change with it.
Each page carries an evidence label for the research behind that measurement: strong, moderate or limited. Every one is limited today, and we say so. See every source on the research page.
Questions about the measurements
What does LookFlex measure on my face?
Sixteen things: four about the eyes and brows, five face proportions, three about the jaw and chin, one for cheekbones and three for the nose and lips. Each is calculated from 478 landmarks found on your device, scored against a range that depends on the sex you choose, and shown with the typical range of our reference set.
Are these ranges medical or scientific standards?
No. They are LookFlex's own calibration, expressed in the units of its face model and taken from a small reference set of 45 AI-generated adult portraits. The typical range is the middle half of that set; the scoring range is where a reading scores 100. Both are being validated on real photographs. Treat them as a guide to proportion, not a diagnosis or a ranking of people.
Why are some ranges different for men and women?
Styling convention describes some proportions differently for men and women, for example brow height or jaw width, and LookFlex's ranges follow those conventions. Where the reference set showed no meaningful difference, LookFlex uses one range for everyone. If you choose Other or prefer not to say, it blends the two ranges.
Can I change these measurements?
We found no reliable evidence that habits change bone structure. Many readings still respond to things you control, such as grooming, body composition, and the light, angle and expression of the photo. Each page separates what is fixed from what you can influence, and never recommends unsafe methods.
How precise are the numbers from a selfie?
Every measurement comes with a 95% margin, estimated by measuring your photo three times, and each page lists the median margin on our reference set. Head angle, lighting, expression and camera distance all move the landmarks, and close-up selfies distort proportions, so a retake in different conditions can move further than the margin. LookFlex corrects for head pose and averages with a mirrored copy of your photo. We are still checking the margins on real retakes.
LookFlex provides general information about facial proportions and grooming. It is not medical advice. See a doctor or dermatologist for anything health-related.
Start with a baseline
Answer a few questions and take one photo. Your first scan is free.