[Magnifier design]: The ring sizer belt with a small magnifying glass, which 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 find out your correct ring size. [Wide Applications]: suitable for measuring wedding rings, proposal rings, birthday rings, gifts, jewelry, etc. It is the best 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 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.