This is a Measuring Tool for Rings. Just push one end through the buckle to form . Slide the ring gauge onto the finger. Adjust it for comfort and check that it has just slid over the joint. When the best fit is reached, read the size indicated by the arrow. Features -Color:Black, White -Material:PE -Size:11.00X0.50X0.30cm/4.32X0.20X0.12in -Smooth surface, safe for your use to measure your fingers and can be used for a long time. -Very practical. Easy to get ring size, help you to choose the perfect ring size. -It allows you to order beautiful rings online without worrying about size errors. -Made of premium and excellent material, Finger Sizer Measuring Tool is strong and durable, . -They are reusable, quite convenient to use, and suitable for personal or jewelry shop use. Package list: 10 x Finger Sizer Measuring Tools