MEASURING YOUR HEAD before purchase: A small metal tape measure, or a cloth tape may be used to take your measurement. If possible, have a helper do the measuring in order 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 above for a correct custom fit. Helpful Sizing Tips: To get your size measurement please measure the circumference of the hand all the way around the palm and four knuckles in as straight of a line as possible. Do not include the thumb in the measurement. Then compare your measurement to the chart to find out what size you need.