Early sizing studies
Use top of head to stomion to set fit targets before physical prototyping.
Measurement
Top Of Head To Stomion
25 years · United States
Top Of Head To Stomion for fit, clearance, and sizing decisions across populations.
Top Of Head To Stomion as a population dimension for early fit, sizing, and ergonomics work.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
0.5 cm (3%)
Median male is 0.5 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 17.0 cm
- Median
- 18.3 cm
- High
- 19.6 cm
Female
- Low
- 16.1 cm
- Median
- 17.8 cm
- High
- 19.7 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.
- Back Of Head To EyeMale 17.5Female 16.3cm
- Top Of Head To StomionCurrentMale 18.3Female 17.8cm
- Back Of Head To ChinMale 19.1Female 18.3cm
- Back Of Head To SelionMale 19.6Female 18.3cm
- Head LengthMale 20.0Female 18.0cm
- Back Of Head To LipMale 20.8Female 19.3cm
Typical applications
Accommodation bands
Choose percentile ranges for the people you need to include.
Cross-market work
Compare top of head to stomion 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 top of head to stomion for the ages, percentiles, genders, and countries you design for. Start with a free API key.