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

292 products
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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.
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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.
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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.
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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.
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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.
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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.
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The S-One Lifer Helmet CJ Collins White Gloss/Black Stripes features round vents, a side S1 logo, adjustable chin strap, and is certified for multiple-impact protection. Diagram highlighting the interior features of the S-One Lifer Helmet in CJ Collins White Gloss/Black Stripes, showcasing its multiple impact protection. Includes size chart for selecting the right certified helmet by head circumference.
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The S-One Lifer Helmet in Light Blue Metallic has ventilation holes, black interior padding, an adjustable chin strap, the "S1" logo on the side, and is designed for multi-impact protection. S-One Lifer Helmet / Light Blue Metallic sizing guide with foam and liner features, size chart, and instructions on measuring head circumference for proper fit and multiple impact protection.
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The TLD 25.2 D4 POLY HELMET MIPS QUALIFER BLUE/WHITE is a full-face mountain bike helmet with a visor, blue/white/red geometric design, "Troy Lee Designs" branding, and advanced Mips protection for enhanced safety. The TLD 25.2 D4 Poly Helmet MIPS Qualifer Blue / White is a full-face motocross helmet with a blue and white geometric design, Mips protection, extended visor, and prominent ventilation openings.

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