See Below For Ring Size Method 2
The image above allows you to trace a ring you may already have and measure the inside diameter. Again, these are just for approximate measurements, Ziamond still recommends you visit a jeweler for a professional measurement.
1. Simply take a ring you already wear on your finger and trace the inside onto a piece of paper.
2. Then measure the inside diameter of the circle you traced with a ruler.
3. Use the graphic above as a guide for the measurements you receive.