Measure the finger size and number of fingers.Available in a variety of sizes: 1 - 29 and 1 - 30.You can also measure your pinky ring or male finger.Can be used over and over again.Made of plastic, it is lightweight and thin for easy carrying.It is a tool to measure your finger size when you dont know the size of your ring.Ring gauge band that complies with Japanese standards, you can measure all sizes from Japan standard sizes 1-29 and 1-30. Mini size can also be measured.Packing: 1 x 1-29 Ring Gauge Band & 1 x Ring Gauge Band with 1-30 Loupe Ring Gauge Band (Plastic)