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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A black and gray Oneal Transition Helmet with an aerodynamic design, featuring rotational impact absorption technology and the brand name "Oneal" visible on the side.
Oneal Transition Helmet
From

$299.99 AUD
The S-One Helmet Mini Lifer Purple Matte is a purple protective helmet with ventilation holes, chin straps, and the "S1" logo on the side. It features EPS Fusion Foam for enhanced safety, making it a reliable multi-impact helmet. Image displaying the features of the S1 Lifer Helmet, including detailed information about its EPS Fusion Foam, sweat-absorbing liners, sizing guidelines, and a helmet size chart based on head circumference. Additionally, check out the S-One Helmet Mini Lifer Purple Matte for a compact option with the same top-notch protection.
S-One Helmet Mini Lifer Purple Matte
From

$89.99 AUD
The S-One Helmet Mega Lifer Dark Grey Matte features ventilation holes, adjustable straps, a white S1 logo on the side, and is Australian-certified for high-impact protection. The S-One Helmet Mega Lifer Dark Grey Matte features ventilation holes, a matte finish, and an adjustable chin strap for high-impact protection and comfort.
S-One Helmet Mega Lifer Dark Grey Matte
From

$99.99 AUD
Six rectangular black Velcro strips, part of the S-One Lifer Velcro Kit installation, are arranged in two rows of three on a white background.
S-One Lifer Velcro Kit
From

$7.99 AUD
The Bell Sanction 2 DLX MIPS Caiden Black/White is a lightweight helmet with a colorful pattern featuring blue and yellow kites, black and white checkered designs, and the words "SEND MODE" at the bottom. Equipped with MIPS technology, it ensures optimal protection while maintaining style. A Bell Sanction 2 DLX MIPS Caiden Black/White helmet with a black and white checkered pattern and various colorful graphic designs, including crowns, swirls, and lightning bolts. This lightweight helmet incorporates MIPS technology for enhanced protection.
brand undefined Bell Sanction 2 DLX MIPS Caiden Black/White
From

$329.99 AUD
A Bell Sanction 2 DLX MIPS Ravine Matte Green/Orange full-face helmet with a green, black, and orange camouflage pattern, featuring a visor and chin guard, also equipped with MIPS technology for added protection. A Bell Sanction 2 DLX MIPS Ravine Matte Green/Orange.
brand undefined Bell Sanction 2 DLX MIPS Ravine Matte Green/Orange
From

$299.99 AUD
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A TLD D4 AS Composite Helmet W/MIPS Ever Tarmac with a red and white design featuring the Mips C2 protection system. A TLD D4 AS Composite Helmet W/MIPS Ever Tarmac with a red and white design and a Mips C2 protection system.
TLD D4 AS Composite Helmet W/MIPS Ever Tarmac
From

$784.99 AUD
Two black, curved S-One Lifer Terry Helmet Liners are displayed on a white background, parallel to each other. These washable liners absorb sweat and provide comfort and easy maintenance for your helmet. The S-One Lifer Terry Helmet Liner is a black, washable terry cloth liner for helmets, packed in a clear plastic bag with instructions and warnings on the packaging.
S-One Lifer Terry Helmet Liner
From

$26.99 AUD
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Fox Rampage AS Helmet Teal with MIPS impact protection, isolated on a white background.
brand undefined Fox Rampage AS Helmet Teal
From

$289.99 AUD
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TLD D3 AS Fiberlite Helmet / Spiderstripe Grey / XL
TLD D3 AS Fiberlite Helmet Spiderstripe Grey / Red

$389.99 AUD

 From

$519.95 AUD
Sold out
The TLD 26.1 D4 AS Polyacrylite Helmet / Roamer Clay is a full-face mountain biking or motocross helmet with a geometric brown, beige, and black pattern, orange accents, Troy Lee Designs branding, and advanced Mips protection. The TLD 26.1 D4 AS Polyacrylite Helmet / Roamer Clay size chart displays head circumference in cm for MTB and full-face helmets using color bands for youth, S/M, M/L, XL sizes—including options with Mips brain protection.
TLD 26.1 D4 AS Polyacrylite Helmet / Roamer Clay
From

$599.99 AUD
The TLD 26.1 D4 AS Polyacrylite Helmet / Roamer Magenta is a full-face helmet for motocross or mountain biking, featuring a pink, white, and black geometric design, Troy Lee Designs logos, and Mips brain protection for added safety. The TLD 26.1 D4 AS Polyacrylite Helmet / Roamer Magenta size chart shows head circumference ranges and sizes, including Mips brain protection—perfect for mountain bikers seeking the ideal full-face helmet fit.
TLD 26.1 D4 AS Polyacrylite Helmet / Roamer Magenta
From

$599.99 AUD
Sold out
The TLD 26.1 D4 AS Polyacrylite Helmet in The Line Fire/White is a red, white, and black full-face mountain biking helmet with Mips brain protection and "Troy Lee Designs" branding on the visor and chin guard. TLD 26.1 D4 AS Polyacrylite Helmet - The Line Fire/White size chart shows head circumference (cm) and sizes for MTB and full-face helmets, including Mips protection options.
TLD 26.1 D4 AS Polyacrylite Helmet / The Line Fire/White
From

$599.99 AUD
Sold out
The TLD 26.1 D4 AS Polyacrylite Helmet / Shadow Beetle is a matte green full-face mountain biking helmet with black and white graphics, open face shield, "Troy Lee Designs" peak and chin branding, plus Mips brain protection. TLD 26.1 D4 AS Polyacrylite Helmet (Shadow Beetle) size chart shows head circumference in cm and inch, with corresponding sizes for full-face Mips helmets, all displayed in a color-coded grid format.
TLD 26.1 D4 AS Polyacrylite Helmet / Shadow Beetle
From

$599.99 AUD
The TLD 26.1 D4 AS Composite Helmet in Overspray White/Red is a full-face BMX helmet with red, blue, and yellow flame graphics, visor, Troy Lee Designs logos, and advanced Mips protection for enhanced safety. The TLD 26.1 D4 AS Composite Helmet size chart shows head circumference in inches and cm, with color-coded size ranges for BMX and downhill models like Overspray White/Red, including versions with Mips protection.
TLD 26.1 D4 AS Composite Helmet / Overspray White/Red
From

$829.99 AUD
Sold out
The TLD 26.1 D4 AS Composite Helmet / Lined Up White is a white, black, and orange BMX helmet with graphic patterns, "Troy Lee Designs" on the visor and chin, and advanced Mips protection for enhanced safety. The Troy Lee Designs size chart lists head circumference in inches and centimeters for the TLD 26.1 D4 AS Composite Helmet Lined Up White, covering XXS to XXL sizes for BMX and downhill riders.
TLD 26.1 D4 AS Composite Helmet / Lined Up White
From

$799.99 AUD
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The TLD 26.1 D4 AS Carbon Helmet in Crest Gold is a full-face mountain biking helmet with an aerodynamic design, colorful accents, Mips protection, and "Troy Lee Designs" branding on the visor and chin area. TLD 26.1 D4 AS Carbon Helmet / Crest Gold size chart displays helmet models, head circumference (in/cm), and sizes from 2XS–2XL for mountain biking and downhill full-face helmets with Mips protection.
TLD 26.1 D4 AS Carbon Helmet / Crest Gold
From

$1,099.99 AUD
The S-One Helmet Mega Lifer / White Gloss is a certified skate helmet with a white gloss shell, black ventilation holes, black adjustable chin strap, EPS Fusion Foam for protection, and the "S1" logo on the side. A diagram of the S-One Helmet Mega Lifer in White Gloss, highlighting its multiple impact protection with advanced EPS Fusion Foam.
S-One Helmet Mega Lifer / White Gloss
From

$109.99 AUD
The S-One Helmet Mega Lifer in Navy Matte features EPS Fusion Foam for multi-impact protection, multiple ventilation holes, black adjustable straps, and an S1 logo on the front left side. Chart displaying features of the S-One Helmet Mega Lifer / Navy Matte: includes multi-impact EPS Fusion Foam, head measurement sizing guide, liner options for fit, and instructions for selecting the correct helmet size.
S-One Helmet Mega Lifer / Navy Matte
From

$109.99 AUD
The S-One Helmet Mega Lifer in Silver Glitter features a sparkly matte silver finish, ventilation holes, black chin straps, and an "S1" logo on the front left side. This certified skate helmet provides multiple impact protection for your safety. Helmet size guide infographic for the S-One Helmet Mega Lifer / Silver Glitter with EPS Fusion Foam, includes head circumference sizing chart (inches/cm) and measuring instructions for a perfect multi-impact protective fit.
S-One Helmet Mega Lifer / Silver Glitter
From

$119.99 AUD
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

$109.99 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

$119.99 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

$149.99 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

$159.99 AUD