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 S-One Helmet Mega Lifer / Leopard features a brown and black leopard print, multiple impact protection, a black adjustable chin strap, and ventilation holes. A sizing guide for the S-One Helmet Mega Lifer / Leopard, including a measurement chart, internal helmet diagram, and fitting instructions for this certified multi-impact skate helmet.
S-One Helmet Mega Lifer / Leopard
From

$119.99 AUD
The S-One Helmet Mega Lifer in Black Gloss Glitter features a larger shell, ventilation holes, an adjustable chin strap, and a white "S1" logo on the front left for multiple impact protection. Infographic displaying features of the S-One Helmet Mega Lifer Black Gloss Glitter, details about its EPS Fusion Foam liner, plus a size chart with measurement instructions to choose the right fit.
S-One Helmet Mega Lifer / Black Gloss Glitter
From

$129.99 AUD
The S-One Helmet Mega Lifer in White Gloss/Black Checkers features a "S1" logo on the side, black checkered stripe, black interior padding, EPS Fusion Foam for multi-impact protection, and an adjustable black S-ONE chin strap. Diagram showing the S-One Helmet Mega Lifer (White Gloss/Black Checkers) construction with EPS Fusion Foam, sizing chart, and head measurement guide to ensure multiple impact protection and proper liner fit.
S-One Helmet Mega Lifer / White Gloss/Black Checkers
From

$119.99 AUD
The S-One Helmet Mega Lifer in Blood Red Gloss features black ventilation holes, black interior padding, an adjustable black chin strap, and EPS Fusion Foam for multiple impact protection. Cross-section diagram of the S-One Helmet Mega Lifer / Blood Red Gloss, a certified skate helmet with EPS fusion foam for multi-impact protection, sweat-absorbing liner, and size chart to select the right fit by head circumference.
S-One Helmet Mega Lifer / Blood Red Gloss
From

$119.99 AUD
The S-One Helmet Retro Lifer E-Helmet in White Gloss with Black Checkers features ear protection, a chin strap, and the "S1" logo. Ideal E-bike helmet for riders who value both style and safety. Inside view of the S-One Helmet Retro Lifer E-Helmet in White Gloss/Black Checkers: NTA 8776 certified, deep fit, replaceable ear liner, sweat-absorbing colored liners, and sizes XS to 2X-Large—ideal for e-bike riders.
S-One Helmet Retro Lifer E-Helmet / White Gloss/ Black Checkers
From

$169.99 AUD
The S-One Helmet Retro Lifer E-Helmet in White Gloss features NTA 8776 certification, ventilation holes, black interior padding, an adjustable chin strap, and an "S1" logo on the side. Inside view of the S-One Helmet Retro Lifer E-Helmet / White Gloss, a multi-impact helmet with sweat-absorbing liners in various sizes/colors, labeled by size. Features deep fit, replaceable ear liner, and NTA 8776 certified safety standards.
S-One Helmet Retro Lifer E-Helmet / White Gloss
From

$159.99 AUD
An S-One Helmet Retro Lifer E-Helmet in Ocean Matte, featuring black padding, ventilation holes, and an adjustable chin strap for multi-impact protection, is displayed against a white background. Inside view of the S-One Helmet Retro Lifer E-Helmet / Ocean Matte, featuring deep fit, replaceable ear liner, sweat-absorbing colored sizing liners, and helmet size info from XS to 2X-Large. NTA 8776 certified.
S-One Helmet Retro Lifer E-Helmet / Ocean Matte
From

$159.99 AUD
The S-One Helmet Retro Lifer E-Helmet in Black Matte features ventilation holes, ear protection, an adjustable chin strap, and an "S1" logo on the side. Inside the S-One Helmet Retro Lifer E-Helmet / Black Matte: a deep fit, removable ear liner, sweat-absorbing sizing liners (7 sizes), labeled features, and NTA 8776 certified multi-impact safety.
S-One Helmet Retro Lifer E-Helmet / Black Matte
From

$159.99 AUD
The S-One Helmet Retro Lifer E-Helmet in Black Matte with White Checkers features multi-impact protection, ear coverage, ventilation holes, an adjustable chin strap, the "S1" logo on the side, and is NTA 8776 certified for optimal safety. Inside view of the S-One Helmet Retro Lifer E-Helmet (Black Matte/White Checkers) with deep fit design, replaceable ear liner, sweat-absorbing color liners, NTA 8776 certified safety, and sizes XS to 2X-Large.
S-One Helmet Retro Lifer E-Helmet / Black Matte/ White Checkers
From

$169.99 AUD
The S-One Helmet Retro Lifer E-Helmet in Ambush Green Matte features a matte green finish, three round front vents, black interior padding, a chin strap, and a white "S1" logo on the side. The S-One Helmet Retro Lifer E-Helmet / Ambush Green Matte features a deep fit, replaceable ear liner, sweat-absorbing sizing liners, NTA 8776 safety certification, and a sizing range from XS to 2X-Large.
S-One Helmet Retro Lifer E-Helmet / Ambush Green Matte
From

$159.99 AUD
Sold out
The S-One Lifer Helmet CJ Collins White Gloss/Black Stripes features round vents, a side S1 logo, adjustable chin strap, and is certified for multiple-impact protection. Diagram highlighting the interior features of the S-One Lifer Helmet in CJ Collins White Gloss/Black Stripes, showcasing its multiple impact protection. Includes size chart for selecting the right certified helmet by head circumference.
S-One Lifer Helmet / CJ Collins White Gloss/Black Stripes
From

$99.99 AUD
Slate Blue Matte S-One Lifer Helmet features black foam lining, multiple ventilation holes, adjustable black straps, and a white "S1" logo on the front. Engineered for multi-impact protection. Top-down view of the S-One Lifer Helmet in Slate Blue Matte, showing interior foam and liner details for certified multi-impact protection. Helmet size chart and fitting instructions are displayed below the image.
S-One Lifer Helmet / Slate Blue Matte
From

$99.99 AUD
The S-One Lifer Helmet / Watermelon features a green shell with watermelon-style stripes, black padding, black chin straps, and top ventilation holes—perfect for action sports enthusiasts seeking both safety and style. Top view of the certified S-One Lifer Helmet / Watermelon showing its interior, foam liners, multiple impact protection features, plus a size chart, sizing guide, and certification details.
S-One Lifer Helmet / Watermelon
From

$109.99 AUD
The S-One Lifer Helmet / Rainbow Swirl is a certified skate helmet with rainbow swirl designs, ventilation holes, and adjustable chin straps for multi-impact protection. Infographic detailing the S-One Lifer Helmet / Rainbow Swirl features: multiple impact protection, sizing liners, instructions for measuring head circumference, and a certified skate helmet size chart for proper fit.
S-One Lifer Helmet / Rainbow Swirl
From

$109.99 AUD
The S-One Lifer Helmet in Blood Red Gloss features ventilation holes, a chin strap, and S1 logos for superior multi-impact head protection in classic skate style. The S-One Lifer Helmet in Blood Red Gloss features ventilation holes, a black adjustable chin strap, and is designed for multiple impact protection.
S-One Lifer Helmet / Blood Red Gloss
From

$99.99 AUD
Sold out
The S-One Lifer Helmet in Light Blue Metallic has ventilation holes, black interior padding, an adjustable chin strap, the "S1" logo on the side, and is designed for multi-impact protection. S-One Lifer Helmet / Light Blue Metallic sizing guide with foam and liner features, size chart, and instructions on measuring head circumference for proper fit and multiple impact protection.
S-One Lifer Helmet / Light Blue Metallic
From

$99.99 AUD
The S-One Lifer Helmet in Bright Red Gloss features black adjustable straps, multiple ventilation holes, and offers multi-impact protection for skateboarding and cycling. The S-One Lifer Helmet in Bright Red Gloss features multiple ventilation holes, black adjustable straps, a side logo, and is certified for multi-impact protection for enhanced safety.
S-One Lifer Helmet / Bright Red Gloss
From

$99.99 AUD
The S-One Lifer Helmet in Purple Matte features ventilation holes, black adjustable straps, a side "S1" logo, and delivers certified safety with multiple impact protection. The S-One Lifer Helmet in Purple Matte features ventilation holes and an adjustable black chin strap, shown from a side view, designed for superior head protection and multiple impact protection.
S-One Lifer Helmet / Purple Matte
From

$99.99 AUD
The S-One Lifer Helmet in Purple Tie Dye features black straps, ventilation holes, and certified multi-impact skate helmet safety. The S-One Lifer Helmet / Purple Tie Dye is a certified skate helmet with a purple tie-dye design, black adjustable straps, ventilation holes, and multi-impact protection for enhanced safety and style.
S-One Lifer Helmet / Purple Tie Dye
From

$99.99 AUD
The S-One Lifer Helmet in Hot Pink Gloss features black ventilation holes, multiple impact protection, an adjustable chin strap, and an "S1" logo on the side. The S-One Lifer Helmet in Hot Pink Gloss features ventilation holes, multiple impact protection, and a black adjustable chin strap.
S-One Lifer Helmet / Hot Pink Gloss
From

$99.99 AUD
The S-One Lifer Helmet / Light Pink Cheetah - Pink Helmet Posse Collab features a light pink cheetah print, multiple vents, and adjustable maroon "S1" straps for a customizable fit. The S-One Lifer Helmet / Light Pink Cheetah - Pink Helmet Posse Collab is a pink and maroon cheetah print skate helmet with ventilation holes, adjustable strap, and certified multi-impact protection for safety and style.
S-One Lifer Helmet / Light Pink Cheetah - Pink Helmet Posse Collab
From

$109.99 AUD
The S-One Lifer Helmet in Pink Gloss/Black Checkers features ventilation holes, an adjustable chin strap, S1 logo, and offers certified stylish head protection. The S-One Lifer Helmet in Pink Gloss/Black Checkers features ventilation holes, certified multi-impact protection, and an adjustable black chin strap.
S-One Lifer Helmet / Pink Gloss/Black Checkers
From

$99.99 AUD
The S-One Lifer Helmet in bright orange with black stripes has ventilation holes, an adjustable black chin strap, multi-impact protection, and the "S1" logo on the side. This certified skate helmet offers reliable safety and style. A bright orange S-One Lifer Helmet featuring two black vertical stripes, ventilation holes, adjustable black chin strap, "S1" marking on the left side, and EPS Fusion Foam for multi-impact protection.
S-One Lifer Helmet / Bright Orange/Black Stripes
From

$99.99 AUD
The S-One Lifer Helmet / Orange Matte features black vents, a black chinstrap, "S1" side logo, and EPS Fusion Foam construction for multi-impact protection. The S-One Lifer Helmet in Orange Matte features black adjustable straps, ventilation holes, and multi-impact certified protection, shown against a white background.
S-One Lifer Helmet / Orange Matte
From

$99.99 AUD