Miasuki Helmet Size Guide
Helmet Lining (US) size guide
| CIRCUMFERENCE | Units of Measure |
| 51 | CM |
| 52 | CM |
| 53 | CM |
| 54 | CM |
| 55 | CM |
| 56 | CM |
| 57 | CM |
| 58 | CM |
| 59 | CM |
| 60 | CM |
| 61 | CM |
| 62 | CM |
| 6 3/8 | IN |
| 6 1/2 | IN |
| 6 5/8 | IN |
| 6 3/4 | IN |
| 6 7/8 | IN |
| 7 | IN |
| 7 1/8 | IN |
| 7 1/4 | IN |
| 7 3/8 | IN |
| 7 1/2 | IN |
| 7 5/8 | IN |
| 7 3/4 | IN |
