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 TSG Evolution Helmet in Satin Black features hardshell construction, ventilation holes, an adjustable chin strap, Tuned Fit System, and side logo. The TSG Evolution Helmet in satin black features a hardshell design for biking or skating, high-impact protection, multiple air vents, and an adjustable chin strap, shown in side profile.
TSG Evolution Helmet / Satin Black
From

$99.99 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
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 PROTEC - JR CLASSIC FIT CERTIFIED helmet is black with ventilation holes, gray EPS foam padding for a custom fit, and red adjustable chin straps with a black buckle, shown against a white background. A black PROTEC - JR CLASSIC FIT CERTIFIED helmet features ventilation holes, red adjustable chin straps, and EPS foam padding for a custom fit, displayed against a white background.
PROTEC - JR CLASSIC FIT CERTIFIED
From

$129.99 AUD
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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) 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 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
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 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

$299.99 AUD
A full-face helmet designed for off-road or motocross use, the Bell Sanction Matte Black/White Presence Helmet features a striking matte black and white design with the "Bell Sanction" logo on the side, making it an ideal choice as a BMX race helmet. A matte black and white Bell Sanction Presence full-face BMX race helmet with a visor and ventilation slots.
brand undefined Bell Sanction Matte Black/White Presence Helmet
From

$169.99 AUD
Save $10.00
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

$109.99 AUD

 From

$119.99 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 S-One Helmet Mini Lifer Cyan Matte featuring multiple ventilation holes, adjustable straps, and black interior padding with EPS Fusion Foam for enhanced protection. A S-One Helmet Mini Lifer Cyan Matte featuring black straps, a red clasp, and advanced EPS Fusion Foam for superior protection.
S-One Helmet Mini Lifer Cyan Matte
From

$89.99 AUD
A black S-One Helmet Mega Lifer Black Matte with ventilation holes, adjustable straps, and a white "S1" logo on the front left side. This high-impact helmet also includes free sizing kits for the perfect fit. A **S-One Helmet Mega Lifer Black Matte** branded skate helmet features multiple ventilation holes, an adjustable chin strap, and high-impact protection.
S-One Helmet Mega Lifer Black Matte
From

$109.99 AUD
Save $10.00
S-One Helmet Retro Lifer White Gloss/Black Stripe (AJ Nelson) with a black vertical stripe down the center, labeled with "S1" on the side. This certified helmet features ventilation holes and a chin strap with padding around the ears and neck. S-One Helmet Retro Lifer White Gloss/Black Stripe (AJ Nelson) with a black stripe down the center and two ventilation holes, featuring cushioned interior padding and a black adjustable strap. This high-impact helmet ensures maximum safety for all your activities.
S-One Helmet Retro Lifer White Gloss/Black Stripe (AJ Nelson)

$129.99 AUD

 From

$139.99 AUD
Save $10.00
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

$109.99 AUD

 From

$119.99 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
Save $0.27
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

$6.99 AUD

 From

$7.26 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
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

$109.99 AUD
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
Sold out
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