Caucasian Hair
- shaft diameter: moderate with minimal variation
- pigment granules: moderately dense with fairly even distribution
- cross-sectional shape: oval
Mongoloid Hair
- shaft diameter: coarse, usually little or no variation
- pigment granules: densely distributed, arranged in patchy areas/streaks
- cross-sectional shape: round
Negroid Hair
- shaft diameter: moderate to fine, some variation
- pigment granules: prominent clumps, densely didstrubted
- cross-sectional shape: flattened