Arai Helmets Size Chart

Arai Corsair V DiSalvo Helmet
Helmet Sizes by Head Circumference
Helmet Size Centimeters
X-Small 53-54
Small 55-56
Medium 57-58
Large 59-60
X-Large 61-62
2X-Large 63-64
Arai Corsair V Russell Helmet
Comfort Lining Thickness
Helmet Size Lining Code 12 mm Thick 10 mm Thick 7 mm Thick 5 mm Thick
X-Small Liner II (SM) Option Standard Option Option
Small Liner II (SM) Option Option Standard Option
Medium Liner III (MD) Option Standard Option Option
Large Liner III (MD) Option Option Standard Option
X-Large Liner IV (LG) Option Option Standard Option
2X-Large Liner IV (LG) Option Option Option Standard
Arai Corsair V Fiction Helmet
Cheek Pad Thickness
Helmet Size RX-7 Quantum Astral Profile VX-Pro MXC-Pro XD
Optional 40 mm 40 mm       40 mm  
Optional 40 mm 40 mm   40 mm 35 mm   35 mm
X-Small 35 mm 35 mm 35 mm 35 mm 30 mm 35 mm 30 mm
Small 30 mm 30 mm 30 mm 30 mm 25 mm 35 mm 25 mm
Medium 30 mm 30 mm 30 mm 30 mm 25 mm 35 mm 25 mm
Large 25 mm 25 mm 25 mm 25 mm 20 mm 30 mm 20 mm
X-Large 25 mm 25 mm 25 mm 25 mm 20 mm 30 mm 20 mm
2X-Large 20 mm 20 mm 20 mm 20 mm 15 mm 25 mm 15 mm
Optional 15 mm 15 mm 15 mm 15 mm 12 mm 20 mm 12 mm
Optional 12 mm 12 mm 12 mm 12 mm   15 mm  
Shell Design Int. Oval Round Oval Int. Oval Long Oval      
Arai RX-Q DNA Helmet
Ear Cup Thickness
Helmet Size Classic/m - Classic/c SZ/m - SZ/c SZRam III
X-Small 30 mm 35 mm 35 mm
Small 25 mm 30 mm 30 mm
Medium 25 mm 30 mm 30 mm
Large 20 mm 25 mm 25 mm
X-Large 20 mm 25 mm 25 mm
2X-Large 15 mm 20 mm 20 mm
Optional   15 mm 15 mm

Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.