This plastic multi-size ring sizing gauge is ideal for ensuring that you order the correct size ring. The gauge is packaged in an envelope with full instructions. It works like a belt, simply form a ring and then place it over the finger and adjust to give a comfortable fit, and then read off the indicated size. This gauge is marked with British Ring Sizes A-Z. If you purchase a ring sizer to ensure that you are ordering the correct ring size, I will refund the price of the ring sizer following the purchase of a ring.