The perfect ring starts with the perfect fit. Our reusable Ring Sizer makes it easy to find your size at home, taking the guesswork out of shopping for your next favorite piece. Simple to use and designed to be kept on hand, it's a helpful tool for building a jewelry collection you'll love for years to come. How to Use Slip the end of the ring sizer through the buckle to create a loop. Place the loop over the finger you'd like to measure. Gently tighten until it fits comfortably, just like a ring. It should slide over your knuckle with a slight amount of resistance. Read the number where the arrow points. That's your U.S. ring size. Tip: If you're between sizes, we recommend sizing up for the most comfortable fit. Details - color: white or black - reusable - measures U.S. ring sizes 1-17 - one size fits all