Early sizing studies
Use trunk length to set fit targets before physical prototyping.
Measurement
Trunk Length
25 years · United States
Trunk Length for fit, clearance, and sizing decisions across populations.
Linear trunk length for product fit, reach envelopes, and human factors studies.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
3.4 cm (8%)
Median male is 3.4 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 43.5 cm
- Median
- 46.1 cm
- High
- 48.3 cm
Female
- Low
- 40.7 cm
- Median
- 42.7 cm
- High
- 45.0 cm
Male vs female distribution
Predicted values at key percentiles for 25-year-olds in the United States (cm).
Related torso measurements
Median values for nearby torso peers in the 25yo US cohort (cm). Male and female medians as paired bars when both are available.
- Seat HeightMale 43.5Female 39.9cm
- Shoulder Breadth BideltoidMale 45.7Female 39.5cm
- Trunk LengthCurrentMale 46.1Female 42.7cm
- Vertical Grip Reach SittingMale 47.0Female 43.7cm
- Maximum Seat LengthMale 48.4Female 43.9cm
- Eye To Table DistanceMale 49.2Female 45.7cm
Typical applications
Accommodation bands
Choose percentile ranges for the people you need to include.
Cross-market work
Compare trunk length 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 trunk length for the ages, percentiles, genders, and countries you design for. Start with a free API key.