Your size in every brand
Sizes differ between brands. Enter your head measurement once and we’ll read each brand’s own published size chart for you, with a link to the chart and the date we checked it. Where we haven’t added a brand’s chart yet, we say so rather than guess.
SHARP suggests measuring around your head just above the ears and at the forehead, and notes that a medium in one brand may be different to a medium in another. Source: SHARP, Get the right fit (checked 9 Oct 2026). A size chart is a starting point: try the helmet on.
Size charts by brand
6 of 15 brands added so far: the 15 brands with the most SHARP-rated helmets.
Airoh
XXS 51–52 cm · XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · XXL 63 cm · XXXL 64 cm
Airoh gives XXL and XXXL as single figures (63 and 64 cm) and advises the smaller size if you're between two.
Source: Airoh: Domande frequenti (FAQ), Tabella taglie, checked 9 Oct 2026Arai
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · XXL 63–64 cm
Arai UK says to start from this measurement and then try the actual model, as models differ in fit. It says some models also come in XXXS (49–50 cm) and XXXL (65–66 cm).
Source: Arai UK (whyarai.co.uk): size guide, checked 9 Oct 2026Bell
XS 53–54 cm · S 54–56 cm · M 56–58 cm · L 58–60 cm · XL 60–62 cm · XXL 62–64 cm · XXXL 64–66 cm
From Bell's US site (we found no UK or European Bell site). Bell gives different charts for some models (below).
Source: Bell Helmets: size charts (Adult moto size chart), checked 9 Oct 2026Bell Eliminator size chart (for Bell Eliminator)
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · XXL 63–64 cm · XXXL 65–66 cm
Source: Bell Helmets: size charts (Eliminator/Eliminator Carbon), checked 9 Oct 2026Bell Lithium / Lithium Mips size chart (for Bell Lithium)
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · XXL 63–64 cm · XXXL 64–66 cm
Bell gives XXXL as 64–66 cm, overlapping XXL.
Source: Bell Helmets: size charts (Lithium/Lithium Mips), checked 9 Oct 2026Bell MX-9 Adventure size chart (for Bell MX-9 ADVENTURE (MIPS))
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · XXL 63–64 cm · XXXL 65–66 cm
Source: Bell Helmets: size charts (MX-9 Adventure), checked 9 Oct 2026Caberg
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · XXL 63–64 cm · XXXL 65–66 cm
Caberg says sizing may vary slightly by model, so check the model's own chart.
Source: Caberg: How to choose the right helmet size (Caberg's World blog), checked 9 Oct 2026MT
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · 2XL 63–64 cm · 3XL 65–66 cm
MT advises the larger size if you're between two.
Source: MT Helmets: size chart (product page 'What's my size?'), checked 9 Oct 2026MT kids size chart
YS 49–50 cm · YM 51–52 cm · YL 53–54 cm
Source: MT Helmets: size chart (product page 'What's my size?'), checked 9 Oct 2026Scorpion
Scorpion publishes no single chart for all its helmets; its charts by model are below.
ScorpionEXO sizing Type A (for Scorpion Exo GT-SP Air, Scorpion EXO 391, Scorpion Exo 491)
XS 53–54 cm · S 55–56 cm · M 57–58 cm · L 59–60 cm · XL 61–62 cm · 2XL 63–64 cm
Scorpion says some models may differ slightly.
Source: ScorpionEXO Europe: size guide (Type A), checked 9 Oct 2026ScorpionEXO sizing Type B (for Scorpion EXO 930 EVO, Scorpion TECH EVO)
XXS 53 cm · XS 54 cm · S 55–56 cm · M 57–58 cm · L 58–59 cm · XL 60–61 cm · 2XL 62–63 cm · 3XL 64–65 cm
Scorpion gives XXS and XS as single figures (53 and 54 cm).
Source: ScorpionEXO Europe: size guide (Type B), checked 9 Oct 2026ScorpionEXO junior size chart
YS 48–49 cm · YM 50–51 cm · YL 52–53 cm
Source: ScorpionEXO Europe: size guide (Junior), checked 9 Oct 2026AGV
Size chart not yet added.
Duchinni
Size chart not yet added.
HJC
Size chart not yet added.
Ls-2
Size chart not yet added.
Nitro
Size chart not yet added.
Nolan
Size chart not yet added.
Shark
Size chart not yet added.
Shoei
Size chart not yet added.
Viper
Size chart not yet added.
