Ergonomics & human factors · 2025

3D measurement & respirator fit

Investigating how facial dimensions differ across demographic groups, with implications for protective-equipment sizing.

The measurement study

Select the diagram to inspect it

Facial measurement locations · Original study figure

Select to enlarge

Facial measurement locations, Figure 1. Hobbs-Murphy and colleagues (2025). Original figure, unaltered.CC BY 4.0 ↗

Kayna’s role: First & corresponding author
Published in: Annals of Work Exposures and Health
Research approach: 3D facial measurement
& statistical analysis

The question

Do facial measurements relevant to respirator fit differ by gender, race/ethnicity and age?

The approach

The study drew on 2,022 existing 3D scans. Measurements were gathered using Anthroscan; 1,677 complete cases entered the reported statistical analysis.

The finding

Significant differences appeared across each demographic category. The findings inform more inclusive approaches to respirator sizing and future fit research.