The frontal rim of the helmet should be 1 inch above the eyebrow. Once the correct height has been established, the chin strap must be correctly fastened. This will keep the helmet in the proper position while you check and adjust the fit of the helmet. To adjust the chin strap, hold the chin cup squarely on the chin, and then adjust and fasten the front straps and finally the back. Make sure the tension is equal on all four straps and that none is pulled out of alignment.
Back of Head: Use your fingers to feel just under the back rim of the helmet. The padding should be in firm, but comfortable contact with the head. If there are any gaps or if the helmet is too tight, try another size helmet.
Back to Front: The fit of the front and back should be checked at the same time, because they affect each other. First, grip the helmet firmly on each side and rotate it gently from side to side, then up and down. The skin of the forehead should move with the helmet. If the helmet moves without moving the skin, try another size helmet. Second, lock your fingers behind your head and pull firmly toward you. If a gap appears between the front liner and the forehead, try another size helmet.
Facemask: The clearance between the end of the nose and the inside of the mask should be at least two to three finger widths. Also, ensure that your vision has not been impaired by the placement of the horizontal bars.
Final Grip Check: The final goal is to obtain a firm, yet comfortable grip on the head.
Top of Head Check: Lock your fingers on the very top of the helmet and firmly pull straight down on your head. Ask your self where the pressure is felt. If the pressure is felt evenly distributed all over then you have a good fit on top. If pressure is felt on top, this is still acceptable. However, if you feel pressure minimally in front and back, then the helmet is too tight.
Side to Side Movement: Place you hands on each side of the helmet and hold your head still. Gently force the helmet from side to side, watching the skin on the forehead. It should move with the helmet. There should be firm resistance to the helmet. The liner should bunch the cheeks, but not slide around to the nose. If there is too much movement, try another size helmet.
Vertical Movement: Place your hands on each side of the helmet and hold your head still. Gently force the helmet up and down. The skin on the forehead should move with the helmet, and with enough force it will eventually slip a little, but it should catch on the eyebrow without coming down on the nose.
Check each helmet for fit using the above criteria (1-8). Change any helmet that does not meet the fitting requirements.
Visually inspect shell for cracks.
Visually check the mask for cracks and distortion. Any mask distorted by 1/8 of an inch or more from the standard form should be replaced.
Check snaps and hardware and make sure they are free of distortion and function properly.
Helmet liners should be checked for deterioration.
Check chin straps for deterioration and general wear and tear.
Remove any helmet immediately that fails to meet the above quality standards.