Measurement reference · FaceFluent editorial · September 13, 2026
Facial index
Face height from the bridge of the nose to the chin, as a percentage of cheekbone width. It is the oldest measurement on this list and the only one with a formal classification attached.
Educational method only. Personal numerical values are currently unavailable in the free preview and reports under the current offer. Existing purchases retain their purchased scope.
Also called morphological facial index, prosopic index, face length to width.
Reference range
None.
We have not validated a population reference interval for this photographic method. Published anatomical measurements do not automatically validate mesh-based estimates.
How we calculate it
One hundred times the vertical distance from the nasion landmark to the chin, divided by the distance between the cheekbone landmarks.
What moves the number
Head pitch changes apparent height; a raised or lowered chin moves this number noticeably. Hairline and jaw obstruction do not affect it, which makes it one of the steadier measurements here.
What it cannot tell you
The classes are descriptions of shape, not grades. A long face and a broad face are both ordinary, and the boundaries between classes are conventions of the scale rather than natural divisions.
References
- Prevalence of Leptoprosopic Type of Face among Dental Students. J Pharm Bioallied Sci, 2021 — describes historical classifications; our scanner does not assign these classes.
- Agreement between cranial and facial classification through clinical observation and anthropometric measurement. BMC Oral Health, 2014.
Facial index is the one measurement on our reference with a formal classification attached. The classes describe a shape. They do not rank it.
Read: The oldest measurement here, and its classesTry a haircut on your photo. On-device landmark annotations are optional and stay in this browser.
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