Clearance and packaging
Use knuckle height for headroom, display height, and vertical fit.
Measurement
Knuckle Height
25 years · United States
Knuckle Height for fit, clearance, and sizing decisions across populations.
Vertical knuckle height for standing or seated fit, clearance, and packaging decisions.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
4.0 cm (6%)
Median male is 4.0 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 70.5 cm
- Median
- 76.5 cm
- High
- 82.5 cm
Female
- Low
- 67.0 cm
- Median
- 72.5 cm
- High
- 78.0 cm
Male vs female distribution
Predicted values at key percentiles for 25-year-olds in the United States (cm).
Related hands measurements
Median values for nearby hands peers in the 25yo US cohort (cm). Male and female medians as paired bars when both are available.
- Fist CircumferenceMale 29.2Female 25.4cm
- Hand CircumferenceMale 29.4Female 26.0cm
- Horizontal Pinch Grip ReachMale 41.7Female 38.1cm
- Fingertip HeightMale 64.5Female 61.4cm
- Knuckle HeightCurrentMale 76.5Female 72.5cm
- Index Finger Height StandingMale 79.5Female 75.4cm
Typical applications
Early sizing studies
Set accommodation targets before a survey or physical prototype.
Cross-market work
Compare knuckle height across countries when products ship globally.
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 knuckle height for the ages, percentiles, genders, and countries you design for. Start with a free API key.