How to measure the size of its ring?
1. - It cuts a role piece. The role strip will have to be of approximately 1,5 cm wide and 12 cm long.
2. - It wraps the finger that you want to measure with the role strip. It slides the role or stamen towards the knuckle, since you will have to insure yourself of that the ring could slide with facility over the knuckle.
4. - With help of a rule, it measures the distance from the beginning of your role up to where you did the mark.