LOOKSMETER · ANTHROPOMETRY & PROPORTIONS GUIDE
fWHR, Midface Ratio & Eye Separation Ratio (ESR), explained
Three numbers dominate modern facial proportion analysis: Facial Width-to-Height Ratio (fWHR), Midface Ratio, and Eye Separation Ratio (ESR). Here is the exact landmark math behind each ratio, what the ideal ranges actually look like, and how to measure yours without selfie distortion.
The five core facial ratios that define facial harmony
Individual features (like nose shape or eye color) matter far less to how a face reads than the spacing between them. Anthropometric facial analysis measures proportions as unitless ratios - dividing one distance on your face by another - so the numbers stay consistent regardless of image resolution:
1. Facial Width-to-Height Ratio (fWHR) · Target 1.80–2.05
Bizygomatic width (left-to-right cheekbone span) divided by upper-face height (brow glabella to upper lip vermilion border). Governs how compact or elongated the central face appears.
2. Midface Ratio · Target 0.95–1.05
Interpupillary distance divided by vertical pupil-to-upper-lip height. Near 1.0 means the central triangle of eyes and mouth forms a balanced square.
3. Eye Separation Ratio (ESR) · Target 0.45–0.48
Interpupillary distance divided by cheekbone width. Measures whether eyes sit harmoniously centered across the width of the skull.
4. Lower-Jaw to Cheekbone Ratio (Bigonial / Bizygomatic) · Target 0.75–0.85
Jaw width at the gonion angles divided by cheekbone width. Around 0.75–0.80 produces a clean taper - closer to 0.85+ produces a square, broad lower third.
5. Vertical Facial Thirds · Target ~33% / 33% / 33%
Compares upper third (hairline to brow), middle third (brow to nasal base), and lower third (nasal base to chin tip).
Why single ratios never tell the whole story
A common mistake in looksmaxxing forums is obsessing over a single ratio in isolation - for example, assuming a 1.75 fWHR is 'bad' without looking at facial thirds or jawline taper. Many tall, angular models have a 1.75–1.80 fWHR paired with strong cheekbones and balanced vertical thirds, while an isolated 2.10 fWHR with high body fat can read round rather than structured.
Use individual ratios to understand which styling levers work in your favor: if your midface ratio is under 0.93, fuller straight brows, textured fringe, or higher-bridge eyewear visually compress vertical length - if your ESR is above 0.48, darker inner-corner brow definition pulls focus inward.
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Frequently asked
What is a good fWHR (Facial Width-to-Height Ratio)?
In anthropometric studies, a balanced Facial Width-to-Height Ratio (bizygomatic cheekbone width divided by upper-face height from brow/glabella to upper lip) typically sits between 1.80 and 2.05 for men and 1.75 to 1.95 for women. Ratios below 1.70 read as a longer, narrower midface, while ratios above 2.10 read as a very broad, compact upper face.
What is the ideal Midface Ratio?
The Midface Ratio compares interpupillary distance (the horizontal distance between pupil centers) to the vertical height from the pupil line down to the upper lip philtrum peak. A balanced midface ratio sits near 0.95 to 1.05 (roughly a 1:1 square between your pupils and upper lip). A lower ratio (under 0.92) indicates a longer vertical midface, while above 1.06 indicates a compact midface.
What is Eye Separation Ratio (ESR)?
Eye Separation Ratio (ESR) is your interpupillary distance divided by total bizygomatic face width at the cheekbones. The balanced benchmark is 0.45 to 0.48 (meaning your pupil centers span 45% to 48% of your face width). Below 0.44 reads as closer-set eyes - above 0.49 reads as wider-set eyes.
Why does my fWHR look lower in a phone selfie than in real life?
Lens perspective distortion. A selfie taken 30 cm away from your face pushes the outer cheekbones backward relative to the nose and central brow, artificially narrowing bizygomatic width on camera by 8–12% and lowering your measured fWHR by 0.15 to 0.25 points. Always step back or use a 2× zoom lens at eye level for an honest ratio read.
Can you change your fWHR or Midface Ratio without surgery?
Bone landmarks don't move in adults, but visual proportion shifts significantly through framing: eyebrow thickness and vertical placement directly define the top boundary of fWHR, facial hair and hairstyle volume shift perceived cheekbone-to-jaw balance, and glasses bridge height breaks up a long midface.
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This page is general information about facial aesthetics terminology, not medical or cosmetic advice. Scores from our tools are AI-generated estimates for entertainment and self-reflection.