The app displays the Japanese Industrial Standards (JIS) for jewelry rings in millimeters and inches.

JIS is used as the standard for measuring the size of jewelry rings in Japan.

It can also be used to measure the size of other rings, such as gold, silver, platinum, and steel.

You can choose between centimeters, millimeters, and inches.

In the case of a ring, the measurement will be the inside diameter and the inside circumference.

You can also choose to display the circle of the inside diameter, or the inside circumference.

If you want to make sure that the measurement is accurate, you can also measure it using a ruler.

It is also possible to display the result of the measurement in a graph.