Helmet Size

 

While helmet safety is regulated (DOT or SNELL), helmet size is far from standard and varies from brand to brand. The charts below are provided from each manufacturer as a reference when purchasing a helmet. Use the provided measuring tape or use a string to obtain an accurate measurement of your head before selecting a helmet size.

Shoei | HJC | Vega | Bikers Choice | KBC | Nolan | Novelties

Shoei

Head Circumference Helmet Size Hat Size Inches Centimeters 6 1/4 - 6 1/2 19 3/4 - 20 1/8 50-52 CHILDS S/M 6 5/8 - 6 3/4 21 1/4 53-54 CHILDS L/XL 6 3/8 - 6 1/2 21 1/8 51-52 XXSmall 6 5/8 - 6 3/4 21 1/4 53-54 XSmall 6 7/8 - 7 21 5/8 55-56 Small 7 1/8 - 7 1/4 22 3/8 57-58 Medium 7 3/8 - 7 1/2 23 1/8 59-60 Large 7 5/8 - 7 3/4 23 1/2 61-62 XLarge 7 7/8 - 8 24 1/4 63-64 XXLarge 8 3/8 - 8 1/2 24 5/8 65-66 XXXLarge

HJC Adult

Head Circumference Helmet Size Hat Size Inches Centimeters 6 3/8-6 1/2 20 1/4-20 1/2 51-52 XXSmall 6 5/8-6 3/4 20 7/8-21 1/4 53-54 XSmall 6 7/8-7 21 5/8-22 55-56 Small 7 1/8-7 1/4 22 3/8-22 3/4 57-58 Medium 7 3/8-7 1/2 23 1/8-23 1/2 59-60 Large 7 5/8-7 3/4 24-24 3/8 61-62 XLarge 7 7/8-8 24 3/4-25 1/8 63-64 XXLarge 8 1/8-8 1/4 25 1/2-26 65-66 XXXLarge

Vega

Head Circumference Helmet Size Hat Size Inches Centimeters 6 5/8 - 6 3/4 20.87 - 21.26 53 - 54 X Small 6 7/8 - 7 21.65 - 22.05 55 - 56 Small 7 1/8 - 7 1/4 22.44 - 22.83 57 - 58 Medium 7 3/8 - 7 1/2 23.23 - 23.62 59 - 60 Large 7 5/8 - 7 3/4 24.02 - 24.41 61 - 62 X Large 7 7/8 - 8 24.80 - 25.20 63 - 64 XX Large 8 1/8 - 8 1/4 25.60 - 26.00 65 - 66 XXXLarge

Bikers Choice

Head Circumference Helmet Size Hat Size Inches Centimeters 6 5/8-6 3/4 20 7/8-21 1/4 53-54 XSmall 6 7/8-7 21 5/8-22 55-56 Small 7 1/8-7 1/4 22 3/8-22 3/4 57-58 Medium 7 3/8-7 1/2 23 1/8-23 1/2 59-60 Large 7 5/8-7 3/4 24-24 3/8 61-62 XLarge 7 7/8-8 24 3/4-25 1/8 63-64 XXLarge

KBC

Head Circumference Helmet Size Hat Size Inches Centimeters 6 3/8-6 1/2 20 1/4-20 1/2 51-52 XXSmall 6 5/8-6 3/4 20 7/8-21 1/4 53-54 XSmall 6 7/8-7 21 5/8-22 55-56 Small 7 1/8-7 1/4 22 3/8-22 3/4 57-58 Medium 7 3/8-7 1/2 23 1/8-23 1/2 59-60 Large 7 5/8-7 3/4 24-24 3/8 61-62 XLarge 7 7/8-8 24 3/4-25 1/8 63-64 XXLarge

Nolan

Head Circumference Helmet Size Hat Size Inches Centimeters 6 5/8-6 3/4 20 7/8-21 1/4 53-54 XSmall 6 7/8-7 21 5/8-22 55-56 Small 7 1/8-7 1/4 22 3/8-22 3/4 57-58 Medium 7 3/8-7 1/2 23 1/8-23 1/2 59-60 Large 7 5/8-7 3/4 24-24 3/8 61-62 XLarge 7 7/8-8 24 3/4 63 XXLarge

Novelties - Big German, Jockey and Kaiser

Head Circumference Helmet Size Hat Size Inches Centimeters 7 - 7 1/8 21 3/4 - 22 3/8 55 - 57 Small 7 1/4 - 7 1/2 22 1/2 - 23 1/8 57 - 59 Medium 7 5/8 - 7 3/4 23 1/4 - 24 60 - 60 Large 7 7/8 - 8 24 1/8 - 24 7/8 61 - 63 X Large

Novelties - Eagle, Smokey and Turtle.

Head Circumference Helmet Size Hat Size Inches Centimeters 6 1/2 - 6 5/8 20 1/4 - 20 7/8 51 - 53 X Small 6 3/4 - 6 7/8 21 - 21 5/8 53 - 55 Small 7 - 7 1/8 21 3/4 - 22 3/8 55 - 57 Medium 7 1/4 - 7 1/2 22 1/2 - 23 1/8 57 - 59 Large 7 5/8 - 7 3/4 23 1/4 - 24 60 - 60 X Large 7 7/8 - 8 24 1/8 - 24 7/8 61 - 63 XX Large

Novelties - Duck Tail, EZ Rider, Little German and Gladiator.

Head Circumference Helmet Size Hat Size Inches Centimeters 6 1/4 - 6 1/2 19 1/2 - 20 1/8 48 - 51 X Small 6 1/2 - 6 5/8 20 1/4 - 20 7/8 51 - 52 Small 6 3/4 - 6 7/8 21 - 21 5/8 52 - 55 Medium 6 7/8 - 7 1/8 21 3/4 - 22 3/8 55 - 56 Large 7 1/8 - 7 3/8 22 1/2 - 23 1/8 57 - 58 X Large 7 3/8 - 7 5/8 23 1/4 - 24 59 - 60 XX Large