Early sizing studies
Use forehead width to set fit targets before physical prototyping.
Measurement
Forehead Width
25 years · United States
Forehead Width for fit, clearance, and sizing decisions across populations.
Lateral forehead width for clearance, fit envelopes, and spatial packaging.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
1.3 cm (12%)
Median male is 1.3 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 11.0 cm
- Median
- 11.7 cm
- High
- 12.3 cm
Female
- Low
- 10.0 cm
- Median
- 10.4 cm
- High
- 11.3 cm
Male vs female distribution
Predicted values at key percentiles for 25-year-olds in the United States (cm).
Related head measurements
Median values for nearby head peers in the 25yo US cohort (cm). Male and female medians as paired bars when both are available.
- BiocularMale 9.4Female 9.7cm
- Back Of Head To TragionMale 10.2Female 10.2cm
- Eye Scalp DistanceMale 11.2Female 10.4cm
- Forehead WidthCurrentMale 11.7Female 10.4cm
- Jaw WidthMale 12.1Female 11.3cm
- Head To TragionMale 13.2Female 12.7cm
Typical applications
Accommodation bands
Choose percentile ranges for the people you need to include.
Cross-market work
Compare forehead width across countries and cohorts from one catalog.
API example
Request a median prediction for a 25-year-old man in the United States. Replace the API key with yours from the dashboard.
Coverage at a glance
176 countries
Population coverage for cross-market work
1–88
Age span for developmental and adult cohorts
1–99
Percentile range for accommodation studies
mm, cm, in
Output units for your design system
Start with a free API key
Request forehead width for the ages, percentiles, genders, and countries you design for. Start with a free API key.