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

Filters

$
to
$
Discipline
Availability
Brand
284 products
Sort by
Sort by
The TLD D4 26.1 Carbon Helmet MIPS in Stealth Black is a matte full-face helmet with a visor and white geometric logo, offering Mips protection—perfect for motocross or mountain biking. The TLD D4 26.1 CARBON HELMET MIPS in Stealth Black is a full-face mountain biking helmet with a visor, Mips protection, and bold white geometric graphics, shown from the side.
TLD D4 26.1 CARBON HELMET MIPS / STEALTH BLACK
From

$1,099.99 AUD
The black S-One Helmet Lifer Black Matte/White Checkers features a white checkerboard stripe, "S1" logo on the side, adjustable straps, and is designed as a multi-impact helmet. Plus, it comes with free sizing kits for the perfect fit. A S-One Helmet Lifer Black Matte/White Checkers featuring a checkered pattern on the side and the "S1" logo in white. This multi-impact helmet includes attached straps for securing under the chin and comes with free sizing kits.
S-One Helmet Lifer Black Matte/White Checkers
$94.99 AUD
S-One Helmet Mini Lifer Leopard Print, featuring certified multiple impact protection and an adjustable chin strap. Graphic representation of a certified multiple impact S-One Helmet Mini Lifer Leopard Print features and sizing chart.
S-One Helmet Mini Lifer Leopard Print
From

$99.99 AUD
A S-One Helmet Lifer Black Matte/Star for head protection and multiple impact protection. A close up of a S-One Helmet Lifer Black Matte/Star for head protection.
S-One Helmet Lifer Black Matte/Star
From

$99.99 AUD
The TSG Dawn Full Cut Helmet in mustard features hardshell construction, black padding, ventilation holes, ear coverage, and an adjustable chin strap, shown on a white background. The TSG Dawn Full Cut Helmet in mustard, shown from the side against a white background, features hardshell construction, ventilation slots, and an adjustable chin strap.
TSG Dawn Full Cut Helmet / Mustard
From

$99.99 AUD
TSG Meta Helmet Satin Black with lightweight in-mold construction, ventilation holes, adjustable straps, buckle, and Dial Fit System, displayed on a plain white background. The TSG Meta Helmet Satin Black features ventilation holes, lightweight in-mold construction, and an adjustable chin strap, shown from the left side.
TSG Meta Helmet Satin Black
From

$129.99 AUD
The S-One Helmet Lifer Black Matte/Yellow Straps features a yellow "S1" logo, yellow adjustable chin strap, ventilation holes, and multi-impact protection for reliable skate safety. Diagram showing S-One Helmet Lifer Black Matte/Yellow Straps features, sizing chart, measurement tips, and how its EPS Fusion Foam liner offers multi-impact protection and sweat absorption for your perfect skate helmet fit.
S-One Helmet Lifer Black Matte/Yellow Straps
From

$89.99 AUD
Sold out
TLD 23 D3 AS Fiberlite Helmet Slant Grey / Grey/Black / XXL A helmet size chart from Troy Lee Designs, featuring the lightweight composite design of the TLD 23 D3 AS Fiberlite Helmet Slant Grey, displays various models in rows and head circumferences (cm) in columns alongside corresponding size recommendations. Perfect for BMX racers seeking optimal fit and performance.
TLD 23 D3 AS Fiberlite Helmet Slant Grey

$282.99 AUD

 From

$519.95 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
Sold out
This Goodstock Certified Helmet / Matte Gunmetal/Bandana features a matte gray finish, adjustable black straps, and cushioning inside. With CoolMax liner tech for comfort, it provides high and low impact protection. Ventilation holes at the top and sides ensure you stay cool during your ride. Gray Goodstock Certified Helmet / Matte Gunmetal/Bandana with an intricate black and white interior design and a chin strap, featuring a label with specifications. This certified skate/bike helmet offers high and low impact protection, along with CoolMax liner tech for added comfort.
Goodstock Certified Helmet / Matte Gunmetal/Bandana
From

$89.99 AUD
A blue multi-impact S-One Helmet Mini Lifer Lagoon Gloss with the word "S1" on it. A blue S-One Helmet Mini Lifer Lagoon Gloss with the word slone on it.
S-One Helmet Mini Lifer Lagoon Gloss
From

$89.99 AUD
Sold out
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 TLD 26.1 D4 Polyacrylite Helmet (MIPS) in Shadow Black features bold white and red graphics, a full-face design with visor, and MIPS protection—making it ideal for downhill mountain biking. TLD 26.1 D4 Polyacrylite Helmet (MIPS) size chart lists head circumference in cm and sizes XS–2XL, helping you pick the right fit for your Shadow Black full face bike and motocross helmet.
TLD 26.1 D4 Polyacrylite Helmet (MIPS) / Shadow Black
From

$589.99 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
Sold out
The TLD D4 AS Carbon W/MIPS Helmet Black / Silver, featuring MIPS Brain Protection System, is shown on a white background. A man is sitting on the ground with a TLD D4 AS Carbon W/MIPS helmet and a bike in front of him.
TLD D4 AS Carbon W/MIPS Helmet Black / Silver
From

$1,099.99 AUD
The S-One Helmet Retro Lifer / Black on Black Leopard Hosoi features a matte black finish with a subtle leopard print, ventilation holes, padded interior, chin strap, multi-impact protection, and a white "S1" logo on the side.
S-One Helmet Retro Lifer / Black on Black Leopard Hosoi
From

$129.99 AUD
The yellow glittery S-One Helmet Lifer Gold Glitter features black straps, ventilation holes, and an "S1" logo. This multi-impact helmet includes an adjustable chin strap for added security. A gold-colored skate helmet with black straps, featuring the "S1" logo on the side. This high-impact S-One Helmet Lifer Gold Glitter ensures both style and safety for every rider.
S-One Helmet Lifer Gold Glitter
From

$109.99 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
Sold out
Protec X Cult BMX Fullcut Helmet / Black / XL
Protec X Cult BMX Fullcut Helmet / Black
From

$149.99 AUD
A certified skate/bike helmet, the Goodstock Certified Helmet / Matte Off-White boasts high impact protection with black adjustable straps and ventilation holes for a comfortable fit, ensuring safety while skating or cycling. A Goodstock Certified Helmet / Matte Off-White with multiple ventilation holes, an EPS foam for added safety, a CoolMax liner for moisture control, and a black strap labeled "Globe.
Goodstock Certified Helmet / Matte Off-White
From

$89.99 AUD
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 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
Sold out
Protec JR Classic Fit Certified Helmet / Tye Die / Youth S
Protec JR Classic Fit Certified Helmet / Tye Die
From

$109.99 AUD