1Ring Size Measuring Tool: Ring finger circumference measurement ruler, used to measure the finger to determine the ring size suitable for wearing, easy to operate. 2Professional Manufacturing: Strictly manufactured in accordance with standard requirements, fine workmanship, pay attention to details, simple and practical for use. 3Practical For Use: Important ring diameter measuring tools give you a better experience, a convenient and quick method to measure your ring size, good performance. 4Suitable For Ring Customization: Small and light weight, easy to store and carry, perfect for wedding ring customization, suitable for jewelry makers and jewelry processing workers. 5Metal And Plastic Material: Ring sizer adopts high quality metal and plastic material, safe and eco friendly, firm and sturdy, wear resistant, no deformation, durable for use.