1.Take a piece of paper or floss and wrap it around the base of your finger.

2. Stretch the length of floss out along a ruler or measuring tape, and take down the length in millimeters.

3. Use the ring size chart below to compare your measurement to the standard ring sizes. 

OR...If you already have a ring that is already a good fit for your finger, all you need to do is take a ruler and measure the ring's inside diameter. Place the ruler from edge to edge of the ring and measure it right across inside the ring.

Here's a sizing tool you can print to make it even easier. .