Harmony & facial ratios
Harmony and facial ratios: every measurement explained
2 min read · Updated October 4, 2026
Harmony is the geometric core of the analysis: 30 ratios and angles measured directly from the landmarks on your front photo. Each page below explains one measurement: what it is, how it is taken, how it is usually read, and what in the photo can throw it off.
How these are measured
Every ratio starts with the same step. A landmark model places points on your face, the photo is levelled along your eye line so a tilted head doesn't skew anything, and each ratio is calculated from distances and angles between those points. The result is compared with ranges set separately for men and women.
Because they come from one photo, these numbers measure that photo as much as your face. Camera distance, lens, head angle, lighting and expression all move them. Before trusting a surprising number, read Taking the right photo and retake it.
How to read this list
Don't try to learn all 30 at once. Open your report, sort the Harmony rows weakest first, and read only the pages for the two or three lowest. The measurements group naturally: facial thirds and face shape describe the whole face, eyes and brows describe the upper face, nose and mouth describe the centre and lower face, and jaw and symmetry describe the structure underneath.
Within a group the ratios overlap on purpose. The three facial thirds add up to 100%, and the nose and eye-gap ratios share the same inner-corner distance, so one photo problem can nudge several rows at the same time. That is a good sign something is wrong with the photo rather than with your face.
What Harmony can and can't tell you
Harmony measures proportion: how the parts of the face relate to each other. It says nothing about skin, how lean or defined the face looks, or how masculine or feminine it reads. Those are the other three pillars. It is also the most photo-sensitive pillar, because every ratio is calculated from distances and angles that change with head angle, lens and expression.
Where to start
If a result looks wrong, start with Why your rating looks wrong. To understand the overall balance of the face, read Facial thirds. For the eye area, Canthal tilt is the best single guide. For how all of this feeds into your number, see Understanding your scores.
Questions about Harmony
Why 30 ratios?
They are the front-view proportions that can be measured reliably from landmarks on one photo. Profile ratios need a side photo, which isn't part of the scan at the moment.
Do I need to understand every one?
No. Start from the lowest rows in your report and read those pages. The rest are there if you're curious.
Do men and women get different ranges?
Yes. Each ratio is compared with ranges set separately for men and women, which is why you choose a sex before scanning.
Can I improve my Harmony score?
Mostly through the photo. Bone proportions don't change, but a level, well-lit, neutral photo often moves several rows. A few rows, like the mouth ratios, also depend on your expression.
Facial thirds
Top Third
The forehead band, from the hairline to the brow line, as a share of total face height.
Middle Third
The band from the brow line to the base of the nose, as a share of total face height.
Lower Third
The band from the base of the nose to the bottom of the chin, as a share of total face height.
Lower Third Proportion
How the lower third is split between the upper lip area and the lip-to-chin area.
Face shape
Face Width to Height Ratio
Cheekbone width divided by the height from the brow line to the upper lip (fWHR).
Bitemporal Width
The width across your temples compared with the width across your cheekbones.
Total Facial Width to Height Ratio
Total face height, hairline to chin, relative to face width; a measure of how long or round the face is.
Cheekbone Height
How high the cheekbones sit on the face, from the upper lip toward the pupils.
Midface Ratio
The distance between your pupils compared with the height from the pupil line to the top of the upper lip.
Eyes & brows
Lateral Canthal Tilt
The angle of the line from the inner to the outer corner of each eye.
One Eye Apart Test
The gap between your eyes compared with the width of one eye.
Eye Aspect Ratio
The width of the eye divided by how far it opens; how almond or round the eye is.
Eye Separation Ratio
The distance between your pupils as a percentage of your cheekbone width.
Eyebrow Tilt
The angle of each brow from its inner end up to its highest point.
Eyebrow Low Setedness
How close your brows sit to your eyes, compared with the size of the eye opening.
Brow Length to Face Width Ratio
The combined length of both brows compared with the width of the face.
Nose
Nose Bridge to Nose Width
The width of the nostrils compared with the width of the nasal bridge.
Intercanthal-Nasal Width Ratio
The width of the nose compared with the gap between the inner corners of the eyes.
Ipsilateral Alar Angle
The angle at the base of the nose between lines running up to the outer corners of the eyes.
Mouth & lips
Mouth Width to Nose Width
The width of the mouth divided by the width of the base of the nose.
Interpupillary-Mouth Width Ratio
The width of the mouth compared with the distance between your pupils.
Lower Lip to Upper Lip Ratio
The height of the lower lip compared with the height of the upper lip.
Cupid's Bow Depth
How far the dip in the middle of the upper lip sits below the two peaks of the bow.
Mouth Corner Position
Whether the corners of your mouth sit above or below the centre of your lip line.
Chin to Philtrum Ratio
The height of the lip-to-chin area compared with the height of the philtrum above the lip.
Jaw & symmetry
Jaw Slope
How steeply the lower jawline runs from the jaw corner to the chin.
Bigonial Width
The width across the corners of the jaw as a percentage of cheekbone width.
Jaw Frontal Angle
The angle between the two sides of the lower jaw as they come together at the chin.
Deviation of IAA & JFA
The gap between your ipsilateral alar angle and your jaw frontal angle.
Facial Symmetry
How closely the left and right sides of your face mirror each other.
See it on a full report
Open the sample report to see every measurement, score and highlight on a real example.