Usage Tips:Quantity and Size to Help Your Operation: you will get 100 finger sizers for rings, 50 white and 50 black, enough to meet your measurement needs and applications Clear Size to Help Your Measurement: finger measure for ring size is 1-17 US size, the printing is accurate and clear, allowing you to measure exactly the length you want, so you can apply them in many different situations Reliable Material to Support Your Usage: the ring size measurement tool is made of Plastic material, lightweight and convenient, does not irritate the skin, you can carry it around and employ it whenever you need it, and it can be reused many times Simple Way to Employment: just put the ring measurer and ring sizer on your hand, tighten it slightly until you feel it completely encloses your finger, then write down the number indicated by the arrow Various Functions in Daily Life: our ring sizer for measuring is suitable for surveying most items, such as wedding rings, proposal rings, party gifts, cute jewelry and other small items, to help you check their size faster Material: Plastic colour: black+white Package Contents: 50 x Ring Measurement Tool black 50 x Ring Measurement Tool white Only the above package content, other products are not included. Note: Light reflection 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.