A metal or cloth tape measure may be used to take your measurement. If possible, have another person do the measuring to get a more accurate measurement.The circumference of the head should be measured at a point approximately one inch above the eyebrows, or at whatever point gives the largest possible measurement. Then check the SIZE CHART below for your fit, do not round down. Please note this does not always insure the perfect fit for every person. All helmets are the same all heads are not. Sizing chart below is size of the helmet, you need to be smaller than below measurements, if your close round up to next size. Electronics are only accepted on DOA or new, unused items in original packaging only! The item "Torc T-5 Skull Cap Motorcycle Half Helmet Fiberglass Lightweight Low Profile" is in sale since Tuesday, April 21, 2020. This item is in the category "eBay Motors\Parts & Accessories\Apparel & Merchandise\Helmets & Headwear\Helmets". The seller is "discount_motorcycle_clothing" and is located in Paso Robles, California. This item can be shipped worldwide.