Helmet Measurements:
- Circumference of the head measured horizontal around the temple
| Covert | Hat Size | Circumference (in) | Circumference (cm) |
| Youth XS | 6 - 6-5/8" | 18-1/2 - 20-3/4" | 47 - 53cm |
| Youth S | 6-1/2 - 7" | 20-1/2 - 22" | 52 - 56cm |
| Youth M | 7 - 7-1/2" | 22 - 23-1/2" | 56 - 60cm |
| Mio | Hat Size | Circumference (in) | Circumference (cm) |
| Universal Toddler | 6 - 6-3/8" | 18 - 20" | 46 - 51cm |
| Shuffle | Hat Size | Circumference (in) | Circumference (cm) |
| Universal Child | 6-1/4 - 6-7/8" | 19-3/4 - 21-3/4" | 50 -55cm |
| Universal Youth | 6-1/2 - 7-1/8" | 20-1/2 - 22-1/2" | 52 -57cm |
Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired.