Fangrui Product Details [magnifier Design]: The Ring Sizer Belt Surface With A Small Magnifying Glass, Which Will Enlarge The Numbers, Letting You See The Finger Size More Clearly. [applicable Size]: Ring Size Ruler Mark Us Size Of 1-17 With Half Size , Finger Size From 1 To 17, Accurate And Clear. [easy To Use]: The Ring Measuring Ruler Is Simple To Use And Has Clear Calibration. Just Wear It On Your Finger And Tighten It Slightly, Then You Will Find Out Your Correct Ring Size. [wide Applications]: Suitable For Measuring Wedding Rings, Proposal Rings, Birthday Rings, Party Gifts, Jewelry, Etc. It Is The Gift For Your Wife And Your Fiends. Colour: Black Material: Plastic Package Contents: 1 * Ring Size Ruler Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.