Upload your photo to measure your upper-to-lower lip ratio and mouth width proportion — and see how they compare to the golden ratio lip standard.
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The lip ratio compares the height of your upper lip with the height of your lower lip. In most faces considered attractive, the lower lip is fuller than the upper lip — aesthetic guidelines commonly describe the lower lip as about one and a half to two times as tall as the upper lip. Lips that follow this proportion look balanced and natural; when the upper lip is as full as or fuller than the lower one, lips can look top-heavy, which is a common sign of overdone lip filler.
Mouth width matters too. A mouth that's in proportion with the eyes — corners reaching roughly to the inner edges of the irises — sits in balance with the rest of the face.
This free lip ratio analyzer measures both and gives you a lip harmony score out of 100.
The analyzer runs Google's MediaPipe Face Mesh in your browser (your photo isn't uploaded) and places landmarks along the edges of your lips, at the corners of your mouth and at the inner corners of your eyes. It measures:
| Measurement | Formula | Target | Weight |
|---|---|---|---|
| Lip ratio | Upper lip height ÷ lower lip height | About 0.65 | 55% |
| Mouth width | Mouth width ÷ distance between the inner eye corners | About 1.5 | 45% |
A lip ratio of 0.65 means the upper lip is about two-thirds the height of the lower lip — or, put the other way, the lower lip is about 1.5 times as tall. Each measurement is scored by how close it is to its target and combined into your score.
| Score | Result |
|---|---|
| 85–100 | Ideal lip harmony |
| 68–84 | Well-proportioned |
| 52–67 | Slight imbalance |
| Below 52 | Notable imbalance |
Your lip type is based on the lip ratio alone:
| Lip ratio | Lip type |
|---|---|
| Under 0.5 | Very full lower lip |
| 0.5–0.7 | Fuller lower lip (ideal) |
| 0.7–0.9 | Near-equal lips |
| 0.9 and over | Equal or fuller upper lip |
Lips are one of the features most associated with youth and femininity — they tend to be fuller in younger faces and thin with age as the lips lose volume and the upper lip lengthens. Full, well-defined lips are generally rated as attractive in women's faces, and balanced lip proportions contribute to overall harmony in everyone.
Proportion matters as much as fullness. That's why the ideal here isn't simply "bigger": a lower lip noticeably fuller than the upper looks natural, while an upper lip that's as full or fuller often looks artificial.
If you're considering lip filler, the lip ratio is a useful thing to understand. Experienced injectors generally aim to keep the lower lip fuller than the upper lip and to avoid overfilling the upper lip, which can create a "duck lip" look. A good practitioner will assess your whole lower face — including your philtrum length and chin — rather than just adding volume. This analyzer can give you a baseline, but treatment decisions should be made with a qualified medical professional.
Aesthetic guidelines commonly describe the ideal lower lip as about 1.5 to 2 times as tall as the upper lip. This analyzer targets an upper-to-lower ratio of about 0.65.
Usually not. In most faces considered attractive, the lower lip is fuller than the upper lip. An upper lip that's equal to or fuller than the lower lip can look top-heavy.
A mouth whose corners reach roughly the inner edges of the irises is usually considered in proportion. This analyzer targets a mouth about 1.5 times as wide as the gap between the inner corners of your eyes.
Yes. Lips lose volume over time and the upper lip gradually lengthens, so lips tend to look thinner as we age.
Yes. It's free, needs no signup, and runs in your browser.