1. Place your ring on top of the ruler
2. Make sure to place the center of the ring on the ruler.
3. Count the millimeters of the inner ø of the ring (1cm = 10mm)
4. Look up your size on the size guide below.

If you don't have a ring that fits you, you can also use a thin string or a strip of paper:

1. Wrap it around your finger
2. Mark where the string or strip meets
3. Measure the length with the ruler (mm).
4. Look up your measurement in the size guide below.