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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Side view of the Bell Sanction 2 White matte entry-level helmet with angular vents and a visor, displayed against a white background. Top view of the Bell Sanction 2 White helmet, an entry-level model, displays interior padding, chin strap, and ventilation areas against a plain white background.
Bell Sanction 2 White
From

$199.99 AUD
The Fox YTH V1 Taunt Helmet is a black, full-face youth BMX helmet with an open front, visor, and a small fox logo on the side—perfect for entry-level riders. Top view of the Fox YTH V1 Taunt Helmet in glossy black, featuring a bold gray fox head logo—a perfect entry-level BMX helmet for young riders.
Fox YTH V1 Taunt Helmet
From

$299.99 AUD
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The TLD 26.1 D4 AS Carbon Helmet in Torched Carbon/Magenta features a full-face design, black base with pink and orange flame graphics, Mips protection, and Troy Lee Designs branding on the visor and chin. TLD 26.1 D4 AS Carbon Helmet (Torched Carbon/Magenta) size chart shows head circumference in inches and cm for this full-face MTB model, including options with Mips protection and a carbon fiber shell.
TLD 26.1 D4 AS Carbon Helmet / Torched Carbon/Magenta
From

$1,129.99 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

$99.99 AUD
The Gain Protection The Edge Pro Helmet (XS - XL) in matte black features featherlight in-mould tech, ventilation slots, an adjustable chin strap, "the edge pro" branding on the side, and is shown on a white background. The Gain Protection The Edge Pro Helmet (XS - XL) is a white helmet with ventilation slots, black adjustable straps, and featherlight in-mould technology for maximum comfort—ideal for action sports.
Gain Protection The Edge Pro Helmet (XS - XL)
From

$119.99 AUD
The S-One Helmet Lifer Mint Green Matte features ventilation holes, black padding, and an adjustable chin strap. Photographed on a white background, this Australian-certified helmet delivers premium protection for every skate session. The S-One Helmet Lifer Mint Green Matte features a black interior, black chin strap, and two front ventilation holes, delivering high-impact protection and comfort for every skate session.
S-One Helmet Lifer Mint Green Matte
From

$89.99 AUD
A pair of black TLD D4 Cheekpads with a contoured design are displayed side by side on a white background—perfect replacement pads for your helmet gear.
TLD D4 Cheekpads
From

$59.99 AUD
Save $60.00
The TLD 25.2 D4 Carbon Helmet MIPS Lowrider Blue features striking geometric graphics, “Troy Lee Designs” branding on the visor and side, and advanced Mips protection—ideal for mountain biking. The TLD 25.2 D4 Carbon Helmet MIPS Lowrider Blue features bold geometric patterns, Troy Lee Designs branding, and advanced Mips protection—ideal for motocross or mountain biking adventures.
TLD 25.2 D4 CARBON HELMET MIPS LOWRIDER BLUE

$1,099.99 AUD

 From

$1,159.99 AUD
The TSG Dawn Flex Full Cut Helmet in white features black interior padding, a red adjustable chin strap, ventilation slots, soft-fit comfort for a secure feel, ear protection, and the TSG logo on the front. TSG Dawn Flex Full Cut Helmet in white, featuring ventilation holes and a red adjustable chin strap for soft-fit comfort, displayed in side profile against a plain background.
TSG Dawn Flex Full Cut Helmet / White
From

$129.99 AUD
The TSG Prevention Helmet Satin Black features a visor, advanced ventilation system with side vents, and an adjustable chin strap, shown against a white background. The TSG Prevention Helmet Satin Black features a matte finish, visor, angular vents, side cutout, adjustable chin strap, “Technical Safety Gear” text on the side, and a ventilation system ideal for BMX riders.
TSG Prevention Helmet Satin Black
From

$249.99 AUD
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The TLD 25.1 D4 Carbon Helmet (MIPS) in Torched Black/Purple features a vibrant flame design on a sleek carbon fiber base with a prominent visor and aerodynamic shape for enhanced protection. Explore the TLD 25.1 D4 Carbon Helmet (MIPS) in Torched Black/Purple with a size chart for various models, including Full Face Helmets, tailored to head measurements. Find your perfect fit for Downhill BMX adventures.
TLD 25.1 D4 Carbon Helmet (MIPS) / Torched Black/Purple
From

$1,139.99 AUD
The S-One Helmet Retro Lifer White Gloss/Black Checkers features a black and white checkered stripe down the middle and the number "51" on the side. This high-impact helmet includes interior padding and a black chin strap for added comfort and safety. A white S-One Helmet Retro Lifer White Gloss/Black Checkers with the black "S1" logo, multiple ventilation holes, and an adjustable black chin strap. This Australian-certified helmet offers superior protection as a high-impact multi-impact helmet.
S-One Helmet Retro Lifer White Gloss/Black Checkers
From

$129.99 AUD
A red speckled S-One Helmet Lifer Red Glitter with a black interior, ventilation holes, and adjustable black straps. The helmet features an "S1" logo on the side and is designed to be a high-impact helmet for ultimate protection. A S-One Helmet Lifer Red Glitter with black straps and the logo "S1" on the side, designed for safety in sports activities.
S-One Helmet Lifer Red Glitter
From

$109.99 AUD
Save $0.18
S-One Lifer Premium Helmet Bag with "STONE Trusted by the Pros" written in white text on the front, featuring a cozy fleece inner liner for added warmth.
S-One Lifer Premium Helmet Bag

$17.99 AUD

 From

$18.17 AUD
A strip of black circular Velcro dots on a white adhesive backing, perfect for your S-One Lifer (12 Pack) Velcro Kit Round Dots or to replace old Velcro on your S1 Lifer helmet. The inside of a bicycle helmet displaying texture, ventilation holes, label 'FRONT', size 'L', and safety certification stickers, equipped with a handy S-One Lifer (12 Pack) Velcro Kit Round Dots for easy adjustments.
S-One Lifer (12 Pack) Velcro Kit Round Dots
From

$6.99 AUD
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A Bell Full-10 SPHR MIPS Matte Black full-face motorcycle helmet with a visor and checkered pattern design, featuring advanced helmet safety technology. A Bell Full-10 SPHR MIPS Matte Black, full-face motocross helmet with a visor and ventilation openings, featuring a sleek design with subtle pattern detailing and advanced helmet safety technology.
brand undefined Bell Full-10 SPHR MIPS Matte Black
From

$1,094.99 AUD
Sold out
TLD D3 AS Fiberlite Helmet / Spiderstripe Black / XXL
TLD D3 AS Fiberlite Helmet / Spiderstripe Black

$389.99 AUD

 From

$519.95 AUD
Bell Sanction 2 Dark Grey helmet with angular vents and a visor, shown in side profile against a white background—perfect as an entry-level mountain bike helmet. The Bell Sanction 2 Dark Grey is a matte gray full-face helmet with a visor, vent openings, and padded interior—shown in left-side profile view—ideal as an entry-level choice for motocross or mountain biking.
Bell Sanction 2 Dark Grey
From

$199.99 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

$89.99 AUD
The S-One Lifer Helmet in black matte with grey straps features ventilation holes, an adjustable chin strap, a certified skate helmet design, and side "S1" logo for multiple impact protection. The S-One Lifer Helmet in Black Matte with grey straps features ventilation holes, an adjustable chin strap, the S1 logo on the side, and is certified for multiple impact protection for enhanced safety.
S-One Lifer Helmet / Black Matte/Grey Straps
From

$89.99 AUD
The S-One Helmet Lifer Blood Red Matte features ventilation holes, an adjustable black chin strap, and the "S1" logo. This Australian-certified helmet provides reliable high-impact protection for skateboarders. The S-One Helmet Lifer Blood Red Matte features ventilation holes, black adjustable straps, and the "S1" logo. Australian-certified, it combines style and high-impact protection—ideal for every skateboarder.
S-One Helmet Lifer Blood Red Matte
From

$89.99 AUD
S-One Helmet Lifer LA Blue Gloss, featuring ventilation holes and an adjustable black chin strap, is shown against a white background. This certified skate helmet provides multi-impact protection for safety and comfort. The S-One Helmet Lifer LA Blue Gloss features two front ventilation holes, black interior padding, multi-impact protection, and an adjustable chin strap.
S-One Helmet Lifer LA Blue Gloss
From

$89.99 AUD
The DRS Helmet Camo is a matte camouflage-patterned bike helmet with multiple ventilation slots, meets Australian standards, and features "DRS" on the lower back—ideal for BMX and skate helmet enthusiasts.
DRS Helmet Camo
From

$79.99 AUD
Sold out
The TLD 25.2 D4 Composite Helmet MIPS Lowrider Grey is a full-face helmet with a vibrant geometric design, "Troy Lee Designs" visor branding, and advanced MIPS protection for superior safety. The TLD 25.2 D4 Composite Helmet MIPS Lowrider Grey is a full-face motocross/BMX helmet with gray, orange, and teal geometric patterns and "Troy Lee Designs" branding on the visor and chin.
TLD 25.2 D4 COMPOSITE HELMET MIPS LOWRIDER GREY

$799.99 AUD

 From

$819.99 AUD