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
257 products
Sort by
Sort by
Save $20.00
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
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
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
From

$114.99 AUD
The TSG Dawn Flex Full Cut Helmet in red features a glossy finish, hardshell construction, ventilation holes, and an adjustable black chin strap for skateboarding safety. The TSG Dawn Flex Full Cut Helmet in red has hardshell construction, ventilation slots, and a black chin strap. Shown from the side on a white background.
TSG Dawn Flex Full Cut Helmet / Red
From

$99.99 AUD
Sold out
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
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
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
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

$99.99 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 $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 black, white, and red full-face bike helmet with a visor, featuring ventilation slits and the brand logo "Bell" on the side. This Bell Sanction 2 DLX MIPS Deft Matte Black incorporates MIPS Technology for advanced protection while remaining a lightweight helmet ideal for both amateur and professional riders. A black, white, and red Bell Sanction 2 DLX MIPS Deft Matte Black is displayed, showcasing its aerodynamic design, visor, ventilation, and protective padding. The brand name "Bell" is visible on the lightweight helmet.
Bell Sanction 2 DLX MIPS Deft Matte Black
From

$299.99 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
Sold out
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
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
Sold out
TLD D3 AS Fiberlite Helmet / Spiderstripe Grey / XL
TLD D3 AS Fiberlite Helmet Spiderstripe Grey / Red

$389.99 AUD

 From

$519.95 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

$119.99 AUD
Sold out
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

$119.99 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

$129.99 AUD