Helmet Size Guides

Getting the right sized helmet is crucial!

Don't gamble with your safety.

Measure around your head

If you haven't got a flexible measuring tape use a piece of string or shoelace! You want to make sure this measurement is as accurate as possible.

100% Status

Adult Size: Inches, Centimeters
XS: 20 7/8 – 21 1/4in, 53 – 54cm
SM: 21 5/8 – 22in, 55 – 56cm
MD: 22 1/2 – 22 7/8in, 57 – 58cm
LG: 23 1/4 – 23 5/8in, 59 – 60cm
XL: 24 – 24 3/8in, 61 – 62cm
XXL: 24 3/4 – 25 1/4in, 63 – 64cm


Youth Size: Inches, Centimeters
SM: 18 1/2 – 18 7/8in, 47 – 48cm
MD: 19 1/4 – 19 5/8in, 49 – 50cm
LG: 20 1/8 – 20 1/2in, 51 – 52cm

Bell Sanction

SIZE: CM, IN
XS: 48-51cm, 18 7/8" – 20 1/8"
S: 52-54cm, 20 1/2" – 21 1/4"
M: 55-57cm, 21 5/8" – 22 1/2"
L: 58-60cm, 23 1/4" – 24 5/8"

Bell Sanction V2

SIZE: CM, IN
XXS: 48-51cm, 19" – 20 1/8"
XS/S: 51-55cm, 20 1/8" – 21 5/8"
M: 55-57cm, 21 5/8" – 22 1/2"
L: 57-59cm, 22 1/2" – 23 1/4"
XL: 59-61cm, 23 1/4" – 24"

Kenny Downhill

XXS: 51-52cm

XS: 53-54cm

S: 55-56cm

M: 57-58cm

L: 59-60cm

XL: 61-62cm

XXL: 63-64cm

TLD

Troy Lee Designs

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The TLD 22S D3 AS Fiberlite Helmet Mono Black, a lightweight composite design, is shown on a white background. TLD 22S D3 AS Fiberlite Helmet / Mono Black / XS
TLD 22S D3 AS Fiberlite Helmet Mono Black

$282.99 AUD

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$519.99 AUD
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S-One Lifer Helmet / Silver Mirror / XS Infographic showcasing the interior and sizing guide for the high-impact S-One Lifer Helmet / Silver Mirror. The diagram provides information on foam, a sweat-absorbing liner, and a helmet size chart for a correct fit, with measurements in inches and cm.
S-One Lifer Helmet / Silver Mirror

$99.99 AUD

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$109.99 AUD
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S-One Lifer Helmet / Boyd Hilder Black/Grey Fade / XXL A diagram of S-One Lifer Helmet / Boyd Hilder Black/Grey Fade showing the protective foam, sizing liners, and a guide on picking the correct helmet size based on head circumference in inches and centimeters. The diagram also highlights that it's a multiple impact helmet and includes information about available sizing kits.
S-One Lifer Helmet / Boyd Hilder Black/Grey Fade

$119.99 AUD

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$134.99 AUD
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Protec Certified Full Cut Helmet / Matte White / XL The Protec Fullcut Certified Helmet, available in matte white, boasts multiple certifications and features ventilation holes along with an adjustable chin strap for a secure fit.
Protec Fullcut Certifed Helmet
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$129.99 AUD
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Bell Sanction Matte Red/Black Presences Helmet / Matte Red/Black / M
brand undefined Bell Sanction Matte Red/Black Presence Helmet
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$169.99 AUD
A certified black and pink S-One Helmet Lifer for head protection, displayed on a white background. A black and pink S-One Helmet Lifer Black Matte/Pink Straps on a white background, ensuring head protection.
S-One Helmet Lifer Black Matte/Pink Straps
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$89.99 AUD
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The S-One Helmet Lifer Black Gloss Glitter features ventilation holes and adjustable straps, offering top-notch protection as a multi-impact helmet. A S-One Helmet Lifer Black Gloss Glitter with a chin strap, the logo "S1" on the side, and Australian-certified helmet standards, comes with free sizing kits.
S-One Helmet Lifer Black Gloss Glitter

$109.99 AUD

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$119.99 AUD
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S-One Lifer Helmet / Dark Matte Green / XL An informative diagram displaying the inside structure of an S-One Lifer Helmet / Dark Matte Green with EPS Fusion Foam and a sizing chart for different head circumferences.
S-One Lifer Helmet / Dark Matte Green

$89.99 AUD

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$99.99 AUD
A Bell Sanction (1) Visor Bolts set with two bolts, two washers, and a three-pronged piece displayed on a white background.
brand undefined Bell Sanction (1) Visor Bolts
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$14.99 AUD
A Goodstock Certified Helmet / Matte Black, featuring ventilation holes and an adjustable chin strap, is shown against a white background. Designed for high and low impact protection, it also incorporates CoolMax liner tech for added comfort. A Goodstock Certified Helmet / Matte Black, viewed from the top, showcases a sleek black design with multiple ventilation holes and integrated CoolMax liner tech for high and low impact protection.
Goodstock Certified Helmet / Matte Black
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$89.99 AUD
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A black multi-impact helmet with a speckled design, featuring the "S1" logo on the front left side and an adjustable chin strap with a red clip. This S-One Helmet Mini Lifer Black Gloss Glitter is constructed with EPS Fusion Foam for superior protection. A black S-One Helmet Mini Lifer Black Gloss Glitter with a glittery finish, visor holes, and an adjustable black strap. The multi-impact helmet features EPS Fusion Foam and white "S1" branding on the side and on the strap.
S-One Helmet Mini Lifer Black Gloss Glitter

$109.99 AUD

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$119.99 AUD
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A white S-One Mini Lifer Helmet with the word sz on it, offering certified high impact protection. Chart detailing the S1 Lifer Helmet sizes, including an internal view of the helmet and sizing instructions. Features EPS Fusion Foam, sweat-absorbing liner, and various certification standards. Also available: S-One Mini Lifer Helmet / Gloss White with Certified Multiple Impact Protection for smaller heads.
S-One Mini Lifer Helmet / Gloss White

$89.99 AUD

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$99.99 AUD
A certified S-One Lifer Helmet / Light Grey with the word s1 on it, providing head protection. An infographic detailing features of the S-One Lifer Helmet / Light Grey, including foam protection, sweat-absorbing liner, multiple impact protection, helmet sizing chart, and instructions for measuring head size to pick the correct helmet size. Free sizing kits are also available for a perfect fit.
S-One Lifer Helmet / Light Grey
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$99.99 AUD
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The S-One Helmet Lifer Purple Gloss Glitter is a purple, glitter-covered high-impact helmet with ventilation holes and an adjustable chin strap. A sizing chart for the Australian-certified S-One Helmet Lifer Purple Gloss Glitter includes measurement instructions, liner sizes (Small to Mega), and an illustration showing where to measure head circumference. The helmet's interior features are also detailed. Free sizing kits are available to ensure a perfect fit.
S-One Helmet Lifer Purple Gloss Glitter

$109.99 AUD

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$119.99 AUD
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A S-One Helmet Lifer Black Matte/Star for head protection and multiple impact protection. A close up of a S-One Helmet Lifer Black Matte/Star for head protection.
S-One Helmet Lifer Black Matte/Star

$89.99 AUD

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$109.99 AUD
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TLD 23 D3 AS Fiberlite Helmet Slant Grey / Grey/Black / XXL A helmet size chart from Troy Lee Designs, featuring the lightweight composite design of the TLD 23 D3 AS Fiberlite Helmet Slant Grey, displays various models in rows and head circumferences (cm) in columns alongside corresponding size recommendations. Perfect for BMX racers seeking optimal fit and performance.
TLD 23 D3 AS Fiberlite Helmet Slant Grey

$282.99 AUD

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$519.95 AUD
The Bell Sanction 2 DLX MIPS Matte Black is a black bicycle helmet with a matte finish, MIPS technology for safety, and two rectangular vents on top. A size chart for the Bell Sanction 2 DLX MIPS Matte Black helmet displays XS/S, M, L, and XL sizes with measurements in centimeters, inches, and hat sizes—ideal for BMX racing helmet fitting.
Bell Sanction 2 DLX MIPS Matte Black
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$279.99 AUD
The S-One Helmet Lifer in Black Matte with Orange Straps showcases vibrant orange straps and ventilation holes on top, designed with Multiple Impact Protection using EPS Fusion Foam for enhanced safety. The S-One Helmet Lifer in Black Matte with Orange Straps showcases ventilation holes and a secure chin buckle, offering optimal head protection.
S-One Helmet Lifer / Black Matte/Orange Straps
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$89.99 AUD
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The black S-One Helmet Lifer Black Matte/White Checkers features a white checkerboard stripe, "S1" logo on the side, adjustable straps, and is designed as a multi-impact helmet. Plus, it comes with free sizing kits for the perfect fit. A S-One Helmet Lifer Black Matte/White Checkers featuring a checkered pattern on the side and the "S1" logo in white. This multi-impact helmet includes attached straps for securing under the chin and comes with free sizing kits.
S-One Helmet Lifer Black Matte/White Checkers

$99.99 AUD

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$104.99 AUD
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A S-One Helmet Lifer Black Camo for skateboarding protection on a white background. A close up of an S-One Helmet Lifer Black Camo labeled for skateboarding.
S-One Helmet Lifer Black Camo

$89.99 AUD

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$109.99 AUD
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The TSG Evolution Helmet in satin black offers high-impact protection, an adjustable chin strap, ventilation holes, and a side logo, displayed against a white background.
TSG Evolution Helmet / Satin Black
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$99.99 AUD
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The POC Crane MIPS Helmet in Matte White features multiple ventilation holes, black adjustable straps, a dual-density liner for protection, and a yellow MIPS safety label on the lower back for rotational impact safety. The POC Crane MIPS Helmet in Matte White, shown from the front, features multiple ventilation holes, an adjustable chin strap, and a dual-density liner for improved protection against rotational impacts.
POC Crane MIPS Helmet / Matte White

$129.99 AUD

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$189.99 AUD
The S-One Helmet Lifer in Black Matte with Green Straps boasts a sleek design featuring ventilation holes, an adjustable chin strap, and is enhanced with EPS Fusion Foam for multiple impact protection, ensuring both safety and style. The S-One Helmet Lifer in Black Matte with Green Straps features ventilation holes and the "S1" logo on the side. This helmet provides certified high impact protection with its multiple impact protection design, ensuring safety.
S-One Helmet Lifer / Black Matte/Green Straps
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$89.99 AUD
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A blue multi-impact S-One Helmet Mini Lifer Lagoon Gloss with the word "S1" on it. A blue S-One Helmet Mini Lifer Lagoon Gloss with the word slone on it.
S-One Helmet Mini Lifer Lagoon Gloss

$89.99 AUD

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$99.99 AUD