Head · Medical · Common
Hair Line
The distance from the hairline to the eyes (midline).
HairLine
How to measure
Application
Used in medical facial proportion assessment, forensic anthropology, and helmet front edge positioning relative to the forehead.
Posture
Head level, hair pushed fully back to expose the hairline.
Landmark
Measured vertically from the centre of the hairline on the forehead to the midpoint between the eyes.
Tool
Rigid ruler or tape measure.
Clothing
Push all hair back fully to expose the hairline edge before measuring.
Common mistake
If the hairline has receded unevenly, measure from the lowest point of the remaining central hairline, not the sides.
API example
Request a predicted value for a 34-year-old woman at the 50th percentile in the United States. Adjust age, percentile, gender, and country to match your design scenario.
POST https://api.humanform.app/v1/predict
Authorization: Bearer hf_live_...
Content-Type: application/json
{
"measurement": "HairLine",
"gender": "Female",
"age": 34,
"percentile": 50,
"country": "US",
"unit": "cm"
}Response values depend on age, percentile, gender, and country. Create a free dashboard account to run live predictions.
See design examples for worked scenarios that combine multiple measurements, or read the methodology page for percentile-based design thinking.
Explore the dataset
Humanform covers 148 measurements with country-adjusted predictions and separate female and male profiles. Browse the full inventory or read the API reference for request syntax.