Feature●(Set Contents) Number of Gauges: 30 pieces (No. 1 to No. 30); Packing: 4 ring gauges (2 white, 2 black)●【Material】The ring size meter is made of durable plastic and is reusable●【Function】It is very convenient to measure the ring size of engagement ring, diamond ring, eternity ring, wedding ring●【How to use】You need to adjust it to the appropriate place to put it in and measure it as a ring of your hands●Note: The weight of the ring gauge itself creates a gap between your finger and the gauge and may be slightly looser than the actual size. For those who have a second joint thicker than the belly of the finger wearing the ring, the size is the right size for the joint to pass through. Finger size may vary due to physical condition, so please measure once in the morning and eveningDescription 【Function】It is very convenient to measure the ring size of engagement ring, diamond ring, eternity ring, wedding ring.