Size Charts for RED Helmets
Hi-Fi Audio, Hi-Fi, Shaun White Trace
| US Size | Measurement (cm) |
| X-Small | 54 |
| Small | 56 |
| Medium | 58 |
| Large | 60 |
| X-Large | 62 |
Frequency, Remix, Skycap, Tantrum, Trace
| US Size | Measurement (cm) |
| Small | 56 |
| Medium | 58 |
| Large | 60 |
| X-Large | 62 |
Womens Skycap
| US Size | Measurement (cm) |
| X-Small | 54 |
| Small | 56 |
| Medium | 58 |
| Large | 60 |
Youth Agent, Youth Buzzcap
| US Size | Measurement (cm) |
| Small-Medium | 52 |
| Medium-Large | 54 |
Youth Trace and Hi Fi
| US Size | Measurement (cm) |
| Small | 49 - 51 |
| Medium | 51 - 53 |
| Large | 53 - 55 |