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PARTS UNL. STREET VOL. I
PARTS UNL. STREET VOL. II

Sizing Tips

Your helmet fit is not only critical to the comfort and enjoyment of your helmet, it also plays a critical role in the performance of your helmet in the event of a collision. Never purchase or wear a helmet without ensuring a snug fit. There are several methods and tricks to size a helmet. HJC recommends the following method.

1. Start with a helmet size you think will fit according to your measurements.

2. Put the helmet on by grasping the chin strap in each hand and pulling it on over your ears until you feel the top portion of the helmet touch. If the helmet immediately feels too tight, ie; your head does not touch the top of the helmet, you cannot pull the helmet down over your ears, or is painful, try the next size larger.

3. Once you have found a helmet that feels comfortable and snug, you must assure that it is not too loose. To do so, with the chin strap securely fastened (see chin strap diagram) grasp the helmet chin bar firmly with one hand and try to move the helmet from side to side and up and down. If the helmet slides on your skin and hair, it is too large. If your scalp and skin want to move with the helmet, the fit is snug.

4. Finally, while still grasping the chin bar, try to rotate the helmet as far down and forward as possible then as far backward as possible. If the helmet feels as if it might slide off in either direction, the helmet is either too big or the chin strap was not securely fastened. Additional note; HJC has a wide range of helmet sizes, but if for whatever reason you cannot find a HJC helmet to fit your head size or shape securely, keep looking.

Sizing Chart For Shoei, HJC & AEON Helmets

Inch Around cm Hat Size Shoei/HJC/Aeon
19-3/4" - 20-1/8" 50-52 6-1/4 - 6-1/2 Childs S/M
21-1/4" 53-54 6-5/8 - 6-3/4 Childs L/XL
21-1/8" 51-52 6-3/8 - 6-1/2 XX-Small
21-1/4" 53-54 6-5/8 - 6-3/4 X-Small
21-5/8" 55-56 6-7/8 - 7 Small
22-3/8" 57-58 7-1/8 - 7-1/4 Medium
23-1/8" 59-60 7-3/8 - 7-1/2 Large
23-1/2" 61-62 7-5/8 - 7-3/4 X-Large
24-1/4" 63-64 7-7/8 - 8 XX-Large
24-5/8" 65-66 8-3/8 - 8-1/2 XXX-Large

Fox Racing Helmet Sizing Chart

KS KM KL
Head Size 186/8-195/8 19¼-20 201/8-21
  XS S M
Head Size 20½-211/16 21¼-221/8 223/8-231/8
  L XL XXL
Head Size 23¼-23¾ 237/8-24¾ 247/8-25¾

Sizing Chart For Skid Lid Helmets

Inch Around cm Hat Size Skid Lids
21-1/4" - 21-5/8" 55-56 6 3/4 - 6 7/8 X-Small
22" - 22-1/2" 57-58 7 - 7 1/8 Small
22-1/2" - 23-1/4" 59-60 7 1/4 - 7 3/8 Medium
23-5/8" - 24" 61-62 7 1/2 - 7 5/8 Large
24-1/2" - 24-7/8" 63-64 7 3/4 X-Large
25-1/4" 65 8 XXL

Sizing Chart For Novelty Helmets

Inch Around cm Hat Size Novelty
19-5/8" - 20-1/8" 50-51 6 - 6-3/4 X-Small
20-1/4" - 20-7/8" 52-53 6-1/2 - 6-5/8 X-Small
21" - 21-5/8" 54-55 6-3/4 - 6-7/8 Small
21-3/4" - 22-3/8" 56-57 7 - 7-1/8 Medium
22-1/2" - 23-1/8" 68-59 7-1/4 - 7-3/8 Large
23-1/4" - 24" 60-61 7-1/2 - 7-5/8 X-Large
24-1/8" - 24-7/8" 62-63 7-3/4 - 7-7/8 XXL

Sizing Chart For Arai Helmets

Inch Around cm Hat Size Arai
20-1/4" 51 6-3/8  
20-1/2" 53 6-1/2 XS
20-7/8" 54 6-5/8 XS
21-1/4" 55 6-3/4 Small
21-5/8" 56 6-7/8 Small
22" 57 7 Medium
22-1/2" 58 7-1/8 Medium
22-7/8" 59 7-1/4 Large
23-1/4" 60 7-3/8 Large
23-5/8" 61 7-1/2 XL
24" 62 7-5/8 XL
24-1/2" 63 7-3/4 XXL
24-7/8" 64 7-7/8 XXL
25-1/4" 65 8 XXXL
25-5/8" 66 8-1/8 XXXL
  67 8-1/4  

Sizing Chart For Answer, MSR & Nolan Helmets

Inch Around cm Hat Size Answer/MSR/Nolan
20-7/8" 54 6-5/8 XS
21-5/8" 56 6-7/8 Small
22-1/2" 58 7-1/8 Medium
23-1/4" 60 7-3/8 Large
24" 62 7-5/8 XL
24-7/8" 64 7-7/8 XXL
25-5/8" 66 8-1/8 XXXL

Sizing Chart For Cyber Helmets

Inch Around cm Hat Size Cyber
20-1/2" 53 6-1/2 XS
21-1/4" 55 6-3/4 Small
22" 57 7 Medium
22-7/8" 59 7-1/4 Large
23-5/8" 61 7-1/2 XL
24-1/2" 63 7-3/4 XXL
25-1/4" 65 8 XXXL

Sizing Chart For KBC Helmets

Inch Around cm Hat Size KBC
22" 57 7 Small
22-7/8" 59 7-1/4 Medium
23-1/4" 60 7-3/8 Large
23-5/8" 61 7-1/2 Large
24-1/2" 63 7-3/4 XL
25-1/4" 65 8 XXL

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