<p><img alt="" src="https://df5apg8r0m634.cloudfront.net/images/2018/0715/eLetU9wtHJ.png" /></p> <p><strong>Step 1: Use</strong> <strong>a metric ruler</strong></p> <p>Use a metric ruler&nbsp;with millimetre markings, the universal unit of measurement set by worldwide frame manufacturers and opticians.<br /> &nbsp;</p> <p><strong>Step 2: Place the frame properly&nbsp;</strong></p> <p>Place the frame on a table or level surface.&nbsp;The arms can be closed or open.<br /> &nbsp;</p> <p><strong>Step 3: Align the ruler and make measurements</strong></p> <p>Align the starting end of the ruler with the one side of the&nbsp;frame at the outer edge of the lens, then measure the distance to the&nbsp;outer edge at the other side of the frame. The bridge length can be measured in a similar way.<br /> &nbsp;</p> <p><strong>Step 4: Measure arm or temple</strong></p> <p>It is necessary to measure the total length of the arm. First measure to the bend and then add the&nbsp;length of the drop for the total temple length.<br /> &nbsp;</p> <p>Providing the correct measurements for the frame will ensure your new eyeglasses fit comfortably.</p>