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 Bell Sanction 2 DLX MIPS Camo Matte Black full-face helmet, shown side-on against a white background, features a matte black geometric design with angular vents and a visor—lightweight yet built for protection. The Bell Sanction 2 DLX MIPS Camo Matte Black helmet is shown from the front, displaying three elongated vents and a matte finish for a lightweight feel.
Bell Sanction 2 DLX MIPS Camo Matte Black
From

$299.99 AUD
The TSG Dawn Flex Full Cut Helmet in red features a glossy finish, hardshell construction, ventilation holes, and an adjustable black chin strap for skateboarding safety. The TSG Dawn Flex Full Cut Helmet in red has hardshell construction, ventilation slots, and a black chin strap. Shown from the side on a white background.
TSG Dawn Flex Full Cut Helmet / Red
From

$99.99 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
Bright pink S-One Helmet Mini Lifer Hot Pink Gloss with multiple ventilation holes and an adjustable black strap. The helmet features the "S1" logo on the front and EPS Fusion Foam for added protection. The S-One Helmet Mini Lifer Hot Pink Gloss is a bright pink helmet with black vent holes and an adjustable black chin strap. It features the logo "S1" on the side and incorporates EPS Fusion Foam for superior protection.
S-One Helmet Mini Lifer Hot Pink Gloss
From

$89.99 AUD
A glittery gray skateboard helmet with air vents, black adjustable chin straps, and an "S1" logo on the side, the S-One Helmet Lifer Silver Glitter offers top-notch protection. A S-One Helmet Lifer Silver Glitter with black straps and multiple ventilation holes, this Australian-certified helmet ensures both safety and style.
S-One Helmet Lifer Silver Glitter
From

$109.99 AUD
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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
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
From

$124.99 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
The TLD 26.1 D4 AS Composite Helmet / Stealth Pumice is a beige and black full-face helmet with geometric graphics, visor, Troy Lee Designs branding, and Mips protection—perfect for downhill or BMX riding. The Troy Lee Designs size chart shows head circumference in inches and cm, with color-coded sizing for BMX and downhill helmets like the TLD 26.1 D4 AS Composite Helmet / Stealth Pumice, including models with Mips protection.
TLD 26.1 D4 AS Composite Helmet / Stealth Pumice
From

$789.99 AUD
The S-One Helmet Lifer in Tree Green Matte features ventilation holes, black adjustable straps, and a white "S1" logo on the left side for multiple impact protection. The S-One Helmet Lifer in Tree Green Matte features ventilation holes, black adjustable straps, side "S1" logo, and is designed for multiple impact protection.
S-One Helmet Lifer / Tree Green Matte
From

$89.99 AUD
The TSG Evolution Helmet / Goldbeck Protest features black graffiti-style text and graphics, hardshell construction for high-impact protection, black adjustable chin straps, a fit system, and foam interior padding. The TSG Evolution Helmet / Goldbeck Protest is a white slim hardshell helmet with black graphic text reading "POWER," "CORRUPTION," and "GREED," plus images. It offers high-impact protection and a black adjustable strap for comfort.
TSG Evolution Helmet / Goldbeck Protest
From

$99.99 AUD
The Bell Sanction 2 DLX MIPS Fast House Matte Black is a lightweight full-face motocross helmet with a visor, featuring MIPS technology for enhanced safety. The Bell Sanction 2 DLX MIPS Fast House provides a sleek black full-face helmet for BMX racing, complete with MIPS technology, a tinted visor, and multiple ventilation openings.
Bell Sanction 2 DLX MIPS Fast House Matte Black
From

$279.99 AUD
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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 $79.96
The Oneal Transition Helmet is a black, lightweight full-face helmet featuring a visor, chin guard, and ventilation openings for maximum airflow. Top view of a black Oneal Transition Helmet with prominent white O'Neal branding on the top, featuring a lightweight full-face design for maximum airflow.
Oneal Transition Helmet
From

$219.99 AUD

$299.99 AUD
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
From

$109.99 AUD
A shiny yellow S-One Helmet Mini Lifer Gold Gloss Glitter with ventilation holes, black straps, and an adjustable buckle. Made with EPS Fusion Foam for superior protection, the helmet features a logo with the letter 'S' and the number '1' on one side. A yellow, glittery, hard-shell helmet with black adjustable straps and multiple ventilation holes. The S-One Helmet Mini Lifer Gold Gloss Glitter has "S1" printed on the side and features EPS Fusion Foam for enhanced protection as a multi-impact helmet.
S-One Helmet Mini Lifer Gold Gloss Glitter
From

$109.99 AUD
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
From

$109.99 AUD
A S-One Helmet Lifer Cyan Matte with ventilation holes, adjustable black chin straps, and "S1" branding on the side. This Australian-certified helmet comes with free sizing kits to ensure the perfect fit. Image of a blue S-One Helmet Lifer Cyan Matte with multiple ventilation holes and a black adjustable strap featuring the S1 logo.
S-One Helmet Lifer Cyan Matte
From

$89.99 AUD
The S-One Helmet Lifer Green Camo provides head protection against multiple impacts. A S-One Helmet Lifer Green Camo on a white background.
S-One Helmet Lifer Green Camo
From

$99.99 AUD
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
From

$89.99 AUD
Save $2.00
S-One Lifer Helmet Star Liner / 2mm Deep
S-One Lifer Helmet Star Liner
From

$4.99 AUD

$6.99 AUD
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Protec Old School Certified Helmet / Gloss White / XXXS
Protec Old School Certified Helmet -/Gloss White

$99.99 AUD

 From

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

$89.99 AUD
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The Bell Sanction 2 Red helmet, shown in matte red with a visor and side profile on a white background, is ideal as an entry-level choice for motocross or mountain biking. The Bell Sanction 2 Red, a matte red full-face entry-level helmet with angular vents and visor, is displayed in profile against a white background.
Bell Sanction 2 Red
From

$199.99 AUD