Early sizing studies
Use back of head to eye to set fit targets before physical prototyping.
Measurement
Back Of Head To Eye
25 years · United States
Back Of Head To Eye for fit, clearance, and sizing decisions across populations.
Back Of Head To Eye as a population dimension for early fit, sizing, and ergonomics work.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
1.2 cm (7%)
Median male is 1.2 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 16.5 cm
- Median
- 17.5 cm
- High
- 18.6 cm
Female
- Low
- 15.1 cm
- Median
- 16.3 cm
- High
- 17.9 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.
- Face BreadthMale 15.1Female 14.2cm
- Head BreadthMale 15.5Female 14.5cm
- Back Of Head To EyeCurrentMale 17.5Female 16.3cm
- Top Of Head To StomionMale 18.3Female 17.8cm
- Back Of Head To ChinMale 19.1Female 18.3cm
- Back Of Head To SelionMale 19.6Female 18.3cm
Typical applications
Accommodation bands
Choose percentile ranges for the people you need to include.
Cross-market work
Compare back of head to eye 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 back of head to eye for the ages, percentiles, genders, and countries you design for. Start with a free API key.