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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Protec JR Classic Fit Certified Helmet / Tye Die / Youth S
Protec JR Classic Fit Certified Helmet / Tye Die
From

$109.99 AUD
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
From

$99.99 AUD
Save $10.00
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

 From

$119.99 AUD
A lightweight helmet, the Bell Sanction 2 DLX MIPS Bonehead Pink/Torquoise with a visor features the word "Bell" on the side and integrates MIPS technology for enhanced safety. A brightly colored, lightweight helmet with a pink, green, and black abstract design, featuring the brand name "Bell" on the side. The Bell Sanction 2 DLX MIPS Bonehead Pink/Turquoise helmet also includes MIPS technology, a full-face shield, and a visor.
brand undefined Bell Sanction 2 DLX MIPS Bonehead Pink/Torquoise
From

$329.99 AUD
A Maroon S-One Lifer Helmet with the word slone on it, designed for head protection and multiple impact resistance. A Maroon S-One Lifer Helmet with the word s1 on it, designed for head protection.
S-One Lifer Helmet / Maroon
From

$89.99 AUD
A black S-One Helmets Star Liner fan-shaped pad. A set of four S-One Helmets Star Liner black foam pads with different sizes, compatible with helmets.
S-One Helmets Star Liner
$5.99 AUD
Save $60.00
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

 From

$189.99 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. The Bell Sanction 2 DLX MIPS Matte Black is an affordable, full-face mountain biking helmet featuring a visor and angular design for optimal performance.
Bell Sanction 2 DLX MIPS Matte Black
From

$279.99 AUD
The TLD 25.1 D4 Carbon Helmet MIPS Stealth Black is a matte black, full-face helmet with white geometric graphics, a visor, and advanced Mips protection—ideal for mountain biking adventures. The TLD 25.1 D4 CARBON HELMET MIPS STEALTH BLACK is a matte black full-face helmet with Mips protection, a visor, and bold white geometric graphics—designed for downhill racing.
TLD 25.1 D4 CARBON HELMET MIPS STEALTH BLACK
From

$1,099.99 AUD
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A blue S-One Helmet Mini Lifer Light Blue Metallic Gloss with black ventilation holes, gray padding inside, and an adjustable black chin strap features advanced EPS Fusion Foam for superior comfort and protection. A helmet sizing chart showing different measurements for various sizes of the S-One Helmet Mini Lifer Light Blue Metallic Gloss. The chart includes a guide on how to measure head circumference and indicates sizes from Mini to Mega, ensuring the perfect fit for this multi-impact helmet with EPS Fusion Foam.
S-One Helmet Mini Lifer Light Blue Metallic Gloss
From

$89.99 AUD
A blue TLD D4 AS Polyacrylite Helmet W/MIPS Shadow Blue with a white Troy Lee Designs logo on it. The TLD D4 AS Polyacrylite Helmet W/MIPS Shadow Blue is shown on a white background, emphasizing its safety features.
TLD D4 AS Polyacrylite Helmet W/MIPS Shadow Blue
From

$584.99 AUD
Save $15.00
A certified S-One Helmet Retro Lifer White Gloss on a white background. A certified S-One Helmet Retro Lifer White Gloss with the word s1 on it, designed for enhanced protection.
S-One Helmet Retro Lifer White Gloss

$119.99 AUD

 From

$134.99 AUD
A S-One Lifer Helmet in black and purple on a white background. A certified S-One Helmet Lifer Black Matte/Purple Straps provides protection on a white background.
S-One Helmet Lifer Black Matte/Purple Straps
From

$89.99 AUD
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S-One Mini Lifer Helmet / Matte Bright Green / XXL Our helmet sizing guide showcases size charts for selecting S1 Lifer helmets, including the S-One Mini Lifer Helmet / Matte Bright Green, based on head circumference in inches and centimeters. It also features information on EPS Fusion Foam and sweat-absorbing liners for optimal comfort and protection.
S-One Mini Lifer Helmet / Matte Bright Green

$89.99 AUD

 From

$99.99 AUD
S-One Lifer Helmet Star Liner / 2mm Deep
S-One Lifer Helmet Star Liner
From

$7.99 AUD
S-One Lifer Helmet / Matte Maroon / XL Diagram showing the features of an S-One Lifer Helmet / Matte Maroon, including EPS Fusion Foam, sweat-absorbing sizing liners, and a size guide. The S-One Lifer Helmet / Matte Maroon is multi-impact certified and meets CPSC, ASTM, and EN 1078 standards for impact protection.
S-One Lifer Helmet / Matte Maroon
From

$89.99 AUD
Sold out
Protec Old School Certified Helmet / Gloss White / XXXS
Protec Old School Certified Helmet -/Gloss White

$99.99 AUD

 From

$119.99 AUD
Sold out
Protec Classic Certified Helmet / Matte Bright Red / XXS
Protec Classic Certified Helmet - Matte Bright Red
From

$89.99 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
From

$89.99 AUD
The S-One Helmet Lifer in Yellow Matte comes with black chin straps and circular ventilation holes. Its EPS Fusion Foam offers certified multiple impact protection, combining style with safety. The S-One Helmet Lifer in Yellow Matte includes adjustable black chin straps, ventilation holes, and EPS Fusion Foam for protection against multiple impacts.
S-One Helmet Lifer / Yellow Matte
From

$89.99 AUD
Introducing the Oneal Transition Helmet—a lightweight black and gold full-face Enduro mountain bike helmet that includes a visor, showcases the O'Neal logo prominently, and features a magnetic buckle for enhanced convenience.
Oneal Transition Helmet
From

$299.99 AUD
Save $10.00
A S-One Helmet Mini Lifer Silver Gloss Glitter with a black interior padding, featuring the logo "S1". It incorporates EPS Fusion Foam for multi-impact protection, multiple ventilation holes, and an adjustable chin strap with a red buckle. The S-One Helmet Mini Lifer Silver Gloss Glitter, featuring ventilation holes and a black adjustable strap with red clasps, is designed for head protection and boasts EPS Fusion Foam for enhanced safety.
S-One Helmet Mini Lifer Silver Gloss Glitter

$109.99 AUD

 From

$119.99 AUD
Save $10.00
The S-One Helmet Retro Lifer Cyan Matte is a blue safety helmet with a black interior, multiple ventilation holes, and a chin strap, featuring "S1" branding on the side. This high-impact helmet ensures ultimate protection while maintaining style. A blue S-One Helmet Retro Lifer Cyan Matte with ventilation holes, black trim, and a chin strap. This multi-impact helmet is designed for both safety and style.
S-One Helmet Retro Lifer Cyan Matte

$109.99 AUD

 From

$119.99 AUD
Save $10.00
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

 From

$119.99 AUD