The femometer Smart Ring Sizing Kit is a minimalist and lightweight tool for accurately sizing rings in sizes 6-9. With a round shape and a standing screen display size of 1 inch, this kit provides a convenient and precise solution for finding the perfect fit for your rings. The kit is designed by lollipop technology hangzhou co ltd and features Bluetooth wireless communication standard for easy use. Perfect for DIY jewelry enthusiasts or professionals in the jewelry industry, this ring sizing kit is a must-have tool for any collection.