Please take a look at this sizing information supplied by Shoei.
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Shoei RF-1400 MM93 Rush Helmet
$829.99
- Aerodynamic Performance Multi-Ply Matrix AIM+ Shell
- Enhanced Vision
- Optimized Ventilation System
- Dual-Layer Multi-Density EPS Liner
- 3D Max-Dry Interior System II
- CWR-F2 Shield & Base Plate System
- Emergency Quick-Release System (E.Q.R.S.)
- Advanced Noise Reduction
- Includes Chin Curtain, Breath Guard, and Pinlock® EVO Lens
- Standards: Snell M2020D and DOT Approved
- Construction: AIM+ (Advanced Integrated Matrix Plus Multi-Ply) Shell
- Weight: 3.64 lbs / 1649 grams (approx, based on size medium solid color)