Inputs this chart requires
Primary: chest girth.
Resolve: chest girth, lower neck, weight.
| Size label | Minimum | Maximum |
|---|---|---|
| XS | 30.48 cm | 45.72 cm |
| S | 40.64 cm | 55.88 cm |
| M | 45.72 cm | 71.12 cm |
| L | 60.96 cm | 86.36 cm |
| XL | 71.12 cm | 111.76 cm |
Decision boundaries
- Chest ranges overlap; neck and weight must also be resolved.
- A walking fit trial does not establish crash performance.
- A manufacturer crash-test statement is not current independent certification.