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
Sold out
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
Sold out
The Bell Sanction 2 DLX MIPS helmet, in matte blue and teal with "BELL" branding, features a visor and black interior. It's an affordable, lightweight full-face design perfect for those seeking style without compromising safety. The Bell Sanction 2 DLX MIPS Matte Blue helmet, viewed from the front against a white background, showcases a geometric design in blue and teal. This lightweight and affordable helmet merges style with MIPS technology for advanced safety.
Bell Sanction 2 DLX MIPS Matte Blue
From

$279.99 AUD
Sold out
Protec Low Pro Certified Helmet in black showcasing a sleek shell design, adorned with a white graphic on the side, and equipped with an adjustable chin strap for a personalized fit. The Protec Low Pro Certified Helmet has a slim design with a black shell adorned with a white spade symbol and comes with adjustable chin straps for a personalized fit, set against a clean white background for added elegance.
Protec Low Pro Certified Helmet
From

$159.99 AUD
Sold out
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
Sold out
A Goodstock Certified Helmet / Tiger Camo with yellow straps, a red Globe logo on the side, and a comfortable CoolMax liner for added comfort and certified protection. Goodstock Certified Helmet / Tiger Camo with orange adjustable straps and a red and white "GLOBE" label near the buckle on a white background. Features a CoolMax liner for added comfort and high impact protection.
Goodstock Certified Helmet / Tiger Camo
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
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)
From

$129.99 AUD
Sold out
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 TLD D4 AS Composite helmet W/MIPS Stealth Black on a white background. A TLD D4 AS Composite Helmet W/MIPS Stealth Black featuring the Mips® C2 protection system on a white background.
TLD D4 AS Composite Helmet W/MIPS Stealth Black
From

$784.99 AUD
S-One Lifer Helmet / Gloss Black
From

$89.99 AUD
A scaled down version of S-One Mini Lifer Helmet in gloss black with shorter straps and the word sz on it. Sizing chart and features for S-One Mini Lifer Helmet / Gloss Black. Includes EPS Fusion Foam, sweat-absorbing liners, and a guide for picking the correct helmet size based on head circumference. This certified multi-impact helmet offers unparalleled protection.
S-One Mini Lifer Helmet / Gloss Black
From

$89.99 AUD
Sold out
A Protec Old School Certified Helmet / Gloss Pink with a retro shape and a black logo on it.
Protec Old School Certified Helmet / Gloss Pink
From

$99.99 AUD
Sold out
TLD D3 AS Fiberlite Helmet / Spiderstripe Grey / Yellow / XL
TLD D3 AS Fiberlite Helmet / Spiderstripe Grey / Yellow

$389.99 AUD

 From

$519.95 AUD
Sold out
TLD 23 D3 AS Fiberlite Helmet / Volt Blue / XL
TLD 23 D3 AS Fiberlite Helmet Volt Blue

$282.99 AUD

 From

$519.95 AUD
Shadow Classic Helmet / XS / Gloss White
Shadow Conspiracy Classic Helmet Gloss White
From

$99.99 AUD
Sold out
Protec JR Classic Fit Certified Helmet / Matte Lime / Youth S
Protec JR Classic Fit Certified Helmet / Matte Lime
From

$109.99 AUD
Sold out
Fox Rampage Pro Carbon MIPS Helmet / Matte Carbon / M
brand undefined Fox Rampage Pro Carbon MIPS Helmet

$499.99 AUD

 From

$749.99 AUD
The TSG Meta Helmet in Satin White features ventilation holes, lightweight In-mold construction, adjustable black straps, a Dial Fit System, and buckle for reliable head protection during sports activities. Screenshot of TSG Meta Helmet / Satin White features list showing protection standards: lightweight In-mold construction, EN 1078, CPSC, UKCA certifications, and the Dial Fit System, each briefly described.
TSG Meta Helmet / Satin White
From

$129.99 AUD
Sold out
The TLD 26.1 D4 AS Polyacrylite Helmet in The Line Charcoal/White features a full-face design with visor, "Troy Lee Designs" branding, and advanced Mips brain protection—ideal for mountain biking. TLD 26.1 D4 AS Polyacrylite Helmet size chart shows head circumferences (cm/in) and sizes from XS to XXL for The Line Charcoal/White full-face mountain bike helmet by Troy Lee Designs.
TLD 26.1 D4 AS Polyacrylite Helmet / The Line Charcoal/White
From

$599.99 AUD
Sold out
The TLD 26.1 D4 AS Composite Helmet in Flared White/Indigo features geometric purple and teal accents, a visor, open face design, Mips protection, and Troy Lee Designs branding. TLD 26.1 D4 AS Composite Helmet (Flared White/Indigo) size chart shows head circumference in inches/cm, with XS–3XL BMX/downhill sizes featuring Mips protection, all displayed in a color-coded table.
TLD 26.1 D4 AS Composite Helmet / Flared White/Indigo
From

$799.99 AUD
Sold out
The TLD 26.1 D4 AS Composite Helmet / Crest Real Teal is a BMX helmet in white, blue, and teal with geometric patterns, "Troy Lee Designs" on the visor, and advanced Mips protection for enhanced safety. The TLD 26.1 D4 AS Composite Helmet / Crest Real Teal is a full-face motocross helmet in teal, white, and black with the Troy Lee Designs logo, featuring advanced Mips protection for added safety.
TLD 26.1 D4 AS Composite Helmet / Crest Real Teal
From

$799.99 AUD
Sold out
The TLD 26.1 D4 AS Composite Helmet in Torched White/Silver features abstract flame graphics, "Troy Lee Designs" branding on the visor and chin, integrated Mips protection, and is shown in profile view. Troy Lee Designs TLD 26.1 D4 AS Composite Helmet Torched White/Silver size chart shows head circumference in inches and centimeters for sizes XS to 3XL, including Mips protection options for BMX and Downhill riders.
TLD 26.1 D4 AS Composite Helmet / Torched White/Silver
From

$829.99 AUD
The TLD 26.1 D4 AS Carbon Helmet / Lined Up is a full-face helmet with Mips, a large visor, black/white/yellow/orange graphics, and bold "Troy Lee Designs" branding for standout style and safety. TLD 26.1 D4 AS Carbon Helmet size chart shows head circumference in inches/cm, with full-face mountain biking helmet sizes (Lined Up model) highlighted in different colors.
TLD 26.1 D4 AS Carbon Helmet / Lined Up
From

$1,099.99 AUD
The TLD 26.1 D4 AS Carbon Helmet in Overspray Gold/Black is a full-face mountain bike helmet for downhill BMX, featuring Mips protection and "Troy Lee Designs" branding on the visor and chin. The TLD 26.1 D4 AS Carbon Helmet size chart shows head circumference ranges in inches and centimeters, covering sizes XS to 3XL, with models like Overspray Gold/Black offering full-face protection and Mips options for downhill BMX or MTB.
TLD 26.1 D4 AS Carbon Helmet / Overspray Gold/Black
From

$1,129.99 AUD