Sizing chart: Castle X Helmets

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Helmet Sizing Guide

Helmet Measurement

Start by measuring the circumference around your head at the temple, just above the eyebrow line (approximately one inch above the eyebrows) using a soft tape measure. Then select the helmet size that is closest to your head from the size chart below. These are only guidelines, it is always best to try on the gear if possible. 

Measuring Tape Placement

The next step in the fitment process are fitment checks. The following tests should be performed with the chin strap properly and securely in place. Helmet movement should also move the skin on your face and scalp. Helmets will fit snug when new and have a break in period. The helmet should not fit so tight as to cause discomfort or pain. If your measurement is at the upper number of any size range, then move up as needed.

  1. With the helmet in place and chin strap secured, shake your head side to side, if the helmet moves independently of your head then the helmet is too big. When performing this test, the helmet liner and cheek pads should be in direct contact with your skin. While shaking, your skin should move with the helmet.
  2. Place one hand directly behind your head and push forward. Use your other hand and try to slip your little finger between your forehead and the helmet EPS Liner. If you are able to slip your finger in, the helmet is too big.
  3. To test for helmet lift, place one hand on the chin bar and push up (while the chin strap is secured), if the helmet comes off your head it is too big. Next, place one hand on the back and push up again, if your helmet lifts off your head the helmet is too big.
 Size: Adult XSM SML MED LRG XLG 2XL 3XL 4XL 5XL
Centimeters 53-54 55-56 57-58 59-60 61-62 63-64 65-66 67-68 69-70
Hat Size 6 1/2-6 3/4 6 3/4-7 7-7 1/4 7 1/4-7 1/2 7 1/2-7 3/4 7 3/4-8 8-8 1/4 8 1/4-8 1/2 8 1/2-8 3/4
Inches 20 3/4-21 1/4 21 1/2-22 22 1/2-22 3/4 23 1/4-23 1/2 24-24 1/2 24 3/4-25 1/4 25 1/2-26 26 1/2-26 3/4 27 1/4-27 1/2
Size: Youth
SML MED LRG XLG



Centimeters
49-50 51-52 53-54 55-56



Hat Size
6-6 1/4 6 1/4-6 1/2 6 1/2-6 3/4 6 3/4-7



Inches
19 1/4-19 3/4 20-20 1/2 20 3/4-21 1/4 21 1/2-22