Early sizing studies
Use buttock popliteal length to set fit targets before physical prototyping.
Measurement
Buttock Popliteal Length
Buttock Popliteal Length for fit, clearance, and sizing decisions across populations.
Linear buttock popliteal length for product fit, reach envelopes, and human factors studies.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
2.0 cm (4%)
Median male is 2.0 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 45.0 cm
- Median
- 50.0 cm
- High
- 55.0 cm
Female
- Low
- 43.5 cm
- Median
- 48.0 cm
- High
- 52.6 cm
Male vs female distribution
Predicted values at key percentiles for 25-year-olds in the United States (cm).
Related legs measurements
Median values for nearby legs peers in the 25yo US cohort (cm). Male and female medians as paired bars when both are available.
- Thigh LengthMale 42.8Female 39.1cm
- Popliteal HeightMale 44.5Female 40.5cm
- Leg RoomMale 46.0Female 41.4cm
- Buttock Popliteal LengthCurrentMale 50.0Female 48.0cm
- Knee HeightMale 55.0Female 50.0cm
- Sitting Upper Leg LengthMale 57.7Female 55.0cm
Typical applications
Accommodation bands
Choose percentile ranges for the people you need to include.
Cross-market work
Compare buttock popliteal 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 buttock popliteal length for the ages, percentiles, genders, and countries you design for. Start with a free API key.