This ring size measuring tool is designed to help you measure your finger size accurately. It features a soft ruler that works like a belt, allowing you to slip it onto your finger and adjust it to a comfortable fit. The tool also includes a magnifying glass for easier reading. Simply push the end through the buckle to form a ring shape, slip it onto your finger, and adjust to give a comfortable fit. When the best fit is achieved, read off the size indicated by the arrow.