Method 1: Use a String or Paper
- Wrap a piece of string or paper around the base of your finger.
- Mark the point where the ends meet with a pen.
- Measure the string or paper with a ruler in millimeters (mm).
- Divide by 3.14 (or match to a standard ring size chart) to get the diameter.
Method 2: Measure an Existing Ring
- Take a ring that fits you well.
- Measure the inside diameter in millimeters using a ruler.
- Match the diameter to our standard ring sizes.