Helmet Size Guide - Rider +
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How to Fit a Helmet

The most important thing when buying a helmet is that it fits properly on your head. It should be comfortable and offer you the best protection.
  1. Your helmet size is determined by the circumference of your head and is measured by wrapping a tape measure around your head just above your eyebrows.
  2. When trying on a Helmet. Align the front of the helmet above your eyebrows and hold both straps until the helmet fits well.
  3. Make sure there are no unwanted gaps between the helmet lining and your head. Also, make sure the back of the helmet does not touch the back of your neck.
  4. The helmet should fit snugly and when shaking ones head should not move.
  5. If you wear goggles try them on with the Helmet to make sure they fit properly.

Please note that the producers of helmets all have different ideas on the shape of a human head. Although the size might be right, the shape of the helmet might not fit a particular shape of skull.

Conversion Table

Below is a table that you can use to convert the circumference of your head in centimetr es or inches into a helmet size.

Adult sizing

Centimetres

Inches

Giro

Protec/Bern

Red

Salomon

48

18 7/8

XS

-

-

-

49

19 3/8

XS

-

-

-

50

19 5/8

XS

-

-

-

51

20

XS

XS

-

-

52

20 1/2

S

XS

-

-

53

20 7/8

S

S

-

-

54

21 1/4

S

S

-

-

55

21 5/8

M

M

S

S

56

22

M

M

S

S

57

22 3/8

M

L

S/M

M

58

22 ¾

M

L

M

M

59

23 ¼

L

XL

M/L

L

60

23 5/8

L

XL

L

L

61

24

L

-

L/XL

XL

62

24 3/8

L

-

XL

XL

63

24 3/4

 

-

XL

 

 

Youth sizing

Protec

One size – 49-54 adjustable

OkCo

One size – 50-60 adjustable

Red

Small = 49-51

Red

Med = 51-53

Red

Large = 53-55

Giro

XS/S = 49-54

Giro

M/L = 54-58

Giro

XS = 52-53.5

Giro

Small = 53.5-55.5

Giro

Med = 55.5-57

Giro

Large = 57-59

 



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