Head · Medical · Specialist
Bitragion Width
The width between the two tragion points on the head.
BitragionWidth
How to measure
Application
Used in headset, hearing protection, and eyewear temple design to determine the required lateral span of a device across the head at ear level.
Posture
Head level, looking straight ahead.
Landmark
Measured between the two tragion points — the small notch at the top of each ear canal opening where the ear meets the face.
Tool
Spreading caliper or tape measure.
Assistance
A second person should locate both tragion points and position the caliper.
Common mistake
Measuring to the outer edge of the ear rather than the tragion notch gives a wider and incorrect result.
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": "BitragionWidth",
"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.