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509 Size Chart


509 Helmet Sizing

View all 509
Size Head (cm)
XS 53-54
SM 55-56
MD 57-58
LG 59-60
XL 61-62
2XL 63-64
3XL 64-65
4XL 66-67

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.


How to Measure

  • H Head
    Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.

509 Men's Jacket Sizing

View all 509
Size Chest (in) Waist (in) Arm (in)
XS 34-36 30 27
SM 36-38 32 28
MD 39-41 34 30
LG 42-44 36 32
XL 45-47 38 34
2XL 48-50 40 36
3XL 52-54 42 36

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.


How to Measure

  • C Chest
    Measure around the fullest part of your chest, under the armpits, keeping the measuring tape parallel to the ground.
  • A Arm (Neck to Wrist)
    Standing up straight with your arms at your sides, measure from the base of your neck at the center of your spine, along the top of your shoulder and down to your wrist bone, along the outside of the arm.
  • W Waist
    Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.

509 Youth Helmet Sizing

View all 509
Size Head (cm)
SM 47-48
MD 49-50
LG 51-52

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.


How to Measure

  • H Head
    Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.