Features
Facial Symmetry
3 min read · Updated October 4, 2026
How closely the left and right halves of the face match, region by region.
How it's assessed
Unlike the rest of Features, symmetry is not graded by an AI model. It is measured with landmark geometry: pairs of matching points on each side of the face are mirrored across the facial midline, and the distance between each mirrored point and its partner is compared with face width. Lower asymmetry gives a higher score.
The overall Facial Symmetry ratio is in Harmony. The ten items below break the same idea down by region so you can see where any difference actually sits. Small differences are normal on every face.
Jaw Asymmetry
Whether the two sides of the jaw sit at the same height and distance from the centre.
Eye Asymmetry
Whether the two eyes match in position, corner height and opening. Many people have one eye slightly higher or more open, so a small difference is normal.
Eyebrow Asymmetry
Whether the brows match in height, length and arch. Brows are the most common source of visible asymmetry and are easy to even out with grooming.
Cheekbone Asymmetry
Whether the two cheekbones sit at the same height and width.
Nose Bridge Asymmetry
Whether the sides of the nasal bridge match, which shows whether the nose runs straight. A tilted head makes the nose look off-centre even when it isn't.
Nose Wing Asymmetry
Whether the two nostril wings match in width and height.
Mouth Asymmetry
Whether the mouth corners and lip edges match. A half-smile or a tense jaw adds apparent asymmetry, so relax your mouth.
Ear Asymmetry
Whether the ears sit at matching heights and distances from the face. Hair over the ears can reduce how reliably they are placed.
Temple Asymmetry
Whether the two temples are at matching positions and width.
Vertical Asymmetry
How far the midline features, the nose, lips and chin, drift left or right from a straight line down the centre of the face.
A note
Most apparent asymmetry in a photo comes from the photo: a turned head, a tilted camera, uneven lighting or a lopsided expression. Face the camera squarely and retake if you suspect that.
A worked example
The method is easier to see with numbers. Suppose a hypothetical face is 140 mm wide across the cheekbones. For each pair of matching points, the right-hand point is mirrored across the centre line and the gap to its partner is measured:
| Region | Gap after mirroring | As % of face width |
|---|---|---|
| Eye corners | 1.0 mm | 0.7% |
| Brows | 2.8 mm | 2.0% |
| Nostrils | 0.9 mm | 0.6% |
| Mouth corners | 1.4 mm | 1.0% |
| Cheekbones | 1.1 mm | 0.8% |
| Jaw corners | 2.1 mm | 1.5% |
| Average | 1.6 mm | 1.1% |
Illustrative numbers, not a real person. The app uses more pairs and works in pixels.
Reading the example
An overall figure around 1% means the two halves match to within about a millimetre and a half on a 140 mm face, which is typical and not visible without measuring. The brows show the biggest gap here, and they usually do: they move with expression, they are easy to shape differently on each side, and small differences are easy to see in them.
The per-region rows in the Features pillar split that same overall idea into pieces, so a higher gap in one region shows you where the difference sits.
Questions about symmetry
Is perfect symmetry attractive?
Perfect symmetry is vanishingly rare, and small differences are normal and not unattractive. Many studies associate more symmetry with higher perceived attractiveness, but the effect is modest, and a face can be very attractive with visible asymmetry.
Can the photo create asymmetry?
Yes, and this is the most common cause of a surprising result. A turned head, a tilted camera, one-sided light or a lopsided expression all add apparent asymmetry that isn't in your face.
Does smiling change symmetry?
It can. Many people smile more on one side, which shifts the mouth corners and cheeks. Use a relaxed, closed, neutral mouth for the photo.
Can I reduce asymmetry?
Your bone structure won't change, but grooming can reduce how asymmetric the face looks, especially shaping the brows evenly and choosing a parting or style that doesn't emphasise one side.
See it on a full report
Open the sample report to see every measurement, score and highlight on a real example.