Apparel sizing
Grade shirt collars and neck openings across populations.
Measurement
Neck Circumference
25 years · United States
Neck Circumference for fit, clearance, and sizing decisions across populations.
Circumference of the neck measured at a standard anatomical level, typically at the base of the neck.
Male–female median gap
Difference between median predictions for the 25yo US cohort.
4.6 cm (14%)
Median male is 4.6 cm larger than median female
Design accommodation range
5th to 95th percentile span for the 25yo US cohort (cm).
Male
- Low
- 34.7 cm
- Median
- 37.6 cm
- High
- 40.7 cm
Female
- Low
- 30.6 cm
- Median
- 33.0 cm
- High
- 36.4 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 SelionMale 19.6Female 18.3cm
- Head LengthMale 20.0Female 18.0cm
- Back Of Head To LipMale 20.8Female 19.3cm
- Back Of Head To Nose TipMale 22.4Female 21.1cm
- Neck CircumferenceCurrentMale 37.6Female 33.0cm
- Neck Circumference Adams AppleMale 39.1Female 34.3cm
Typical applications
PPE and uniforms
Size collars, neck seals, and helmet interfaces.
Health screening
Benchmark neck circumference in population health studies.
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 neck circumference for the ages, percentiles, genders, and countries you design for. Start with a free API key.