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.

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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 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

$109.99 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

$109.99 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

$159.99 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

$149.99 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

$149.99 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

$89.99 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
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$89.99 AUD
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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

$99.99 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

$89.99 AUD
The S-One Lifer Helmet / Leopard features a bold leopard print, black straps, multiple vent holes, and multi-impact protection—making it a stylish and safe choice for skating. S-One Lifer Helmet / Leopard sizing guide highlights skateboard helmet features, multiple impact protection, liner options, and a size chart with head circumference measurements in inches and centimeters.
S-One Lifer Helmet / Leopard
From

$99.99 AUD
The S-One Lifer Helmet / Jelly Beans features a multicolored jelly bean pattern, black foam interior, and adjustable chin strap, offering multiple impact protection for action sports. The S-One Lifer Helmet / Jelly Beans is a certified skateboard helmet with a vibrant jelly bean pattern, black adjustable straps, multi-impact protection, and the S1 logo on the side and strap.
S-One Lifer Helmet / Jelly Beans
From

$109.99 AUD
The S-One Lifer Helmet in White Glitter features black padding, ventilation holes, an adjustable chin strap, and a side "S1" logo. Designed for action sports, it offers multi-impact protection for superior safety. A S-One Lifer Helmet in White Glitter, shown from the side against a white background, features black straps and buckle and offers multiple impact protection.
S-One Lifer Helmet / White Glitter
From

$109.99 AUD
The S-One Lifer Helmet in Black Matte with Red Straps is a certified skate helmet featuring ventilation holes and an "S1" logo on the side for multiple impact protection. The S-One Lifer Helmet in Black Matte features red straps and logo, providing certified multi-impact skate safety.
S-One Lifer Helmet / Black Matte/Red Straps
From

$89.99 AUD
The S-One Lifer Helmet in Matte/Pink Checkers features a pink checkered stripe, pink "S1" logo, pink straps, vents, adjustable buckle, and certified multi-impact protection for safety and style. Sizing chart and fitting guide for the S-One Lifer Helmet Matte/Pink Checkers, a certified skate helmet with top impact protection—includes cross-section, liner features, and size selection by head circumference.
S-One Lifer Helmet / Matte/Pink Checkers
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$99.99 AUD
Sold out
The S-One Lifer Helmet Purple Matte features ventilation holes, black adjustable straps, and a white S1 logo, providing multi-impact protection for action sports enthusiasts. Diagram explaining S-One Lifer Helmet Purple Matte features, such as multi-impact protection, a sweat-absorbing liner, and a sizing chart to help you choose the right helmet size based on your head circumference.
S-One Lifer Helmet Purple Matte
From

$89.99 AUD
The S-One Helmet Mega Lifer Purple Matte is an Australian-certified helmet with a matte purple finish, ventilation holes, adjustable chin strap, side "S1" logo, and designed for high-impact protection. The S-One Helmet Mega Lifer Purple Matte features black padding, ventilation holes, an adjustable chin strap, a white "S1" logo, and is Australian-certified for high-impact protection.
S-One Helmet Mega Lifer Purple Matte
From

$89.99 AUD
The TLD 25.2 D4 Headliner is a black and gray geometric mesh replacement liner designed for added comfort and protection inside your D4 helmet.
TLD 25.2 D4 Headliner
From

$79.99 AUD
The TLD 25.2 D4 Poly Helmet MIPS Qualifer in black/yellow features bold angular stripes, the "Troy Lee Designs" logo on the visor, and advanced Mips protection for enhanced safety. The TLD 25.2 D4 POLY HELMET MIPS QUALIFER in black/yellow features angular patterns, red accents, and Troy Lee Designs branding—perfect for mountain biking with advanced Mips protection.
TLD 25.2 D4 POLY HELMET MIPS QUALIFER BLACK / YELLOW
From

$589.99 AUD
Sold out
The TSG Evolution Helmet in satin black features a hardshell construction, air vents, adjustable chin strap, Tuned Fit System, and a small side logo.
TSG Evolution Helmet / Satin Black
From

$99.99 AUD
The TSG Nipper Maxi Helmet in Satin Cabernet is a maroon youth helmet featuring lightweight construction, ventilation holes, adjustable fit chin straps, and a small "tsg" logo on the side. The TSG Nipper Maxi Helmet in Satin Cabernet is a matte burgundy youth helmet with ventilation holes, brown adjustable chin straps, and a white "tsg" logo—lightweight and perfect for young skaters seeking comfort and style.
TSG Nipper Maxi Helmet / Satin Cabernet
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$114.99 AUD
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The TLD 25.1 D4 Composite Helmet (MIPS) in Stealth Caper is a matte brown full-face helmet with geometric patterns, ventilation openings, and an integrated visor; designed for safety on downhill adventures with MIPS protection. Explore the right fit with our helmet size chart for full-face helmets, detailing head circumference in centimeters. The TLD 25.1 D4 Composite Helmet (MIPS) / Stealth Caper is featured, ranging from XS to 2XL—ideal for those seeking downhill helmets with or without MIPS protection!.
TLD 25.1 D4 Composite Helmet (MIPS) / Stealth Caper
From

$789.99 AUD
Sold out
The TLD 25.1 D4 Composite Helmet (MIPS) in Ghostwing White boasts a black and white design with angular patterns and "Troy Lee Designs" on the visor. Ideal for downhill BMX, it offers Mips C2 protection for superior safety without sacrificing style. Troy Lee Designs provides a helmet size chart with head circumferences in cm and sizes for models like the TLD 25.1 D4 Composite Helmet with MIPS, Ghostwing White. It's perfect for downhill BMX riders looking for full face protection or advanced safety features like Mips® C2 technology.
TLD 25.1 D4 Composite Helmet (MIPS) / Ghostwing White
From

$819.99 AUD
The TLD 25.1 D4 Carbon Helmet (MIPS) / Drip White is a full-face motocross helmet, perfect for downhill BMX adventures. It features a visor, air vents, and a striking red, white, and black design with a bold side logo for enhanced style and performance. The Troy Lee Designs size chart covers head circumferences in cm and inches, with sizes XS to 2XL for models like the TLD 25.1 D4 Carbon MIPS Drip White full-face helmet, offering BMX riders an ideal fit.
TLD 25.1 D4 Carbon Helmet (MIPS) / Drip White
From

$1,139.99 AUD
Sold out
A side view of the Bell Sanction 2 Matte Turquoise helmet, featuring angular vents, a visor, and removable cheek pads, ensures excellent airflow. A matte turquoise Bell Sanction 2 off-road motorcycle helmet with a visor and mouth guard, featuring black interior padding and removable cheek pads for added comfort.
brand undefined Bell Sanction 2 Matte Turquoise
From

$199.99 AUD