A helmet that’s the right size and fit’s your child properly will be more comfortable and more effective at protecting your child’s head. First, you’ll want to find the right size. Start by measuring the circumference of your child’s head. Simply wrap a tape measure around your child’s head one inch above their eyebrows. Compare this measurement to the Schwinn Helmet Size Chart to find the right size helmet for your child. Once you’ve found the correct size, make sure it fits them correctly. Place the helmet squarely on your child’s head so that the front of the helmet sits one finger-width above their eyebrows. Next, use the rear dial to find a snug fit - right to tighten, left to loosen. They should be able to shake their head without the helmet slipping off, while still feeling comfortable. Now you’re ready for the straps. Adjust the side clasps to hit just below their ears, forming a “V” shape. Then buckle the chin strap and tighten it so that no more than one finger fits under the strap. Note: Be sure to check your child’s helmet regularly to insure it still fits correctly. Adjustments may be needed now and then due to use.