To measure your ring size, you can follow these steps:

1. Cut a strip of paper or string and wrap it around the base of your finger, marking where it meets.
2. Measure the length of the paper/string in millimeters.
3. Compare the measurement to a ring size chart to find your ring size.

Alternatively, you can also visit a jewelry store and get your finger measured professionally. Keep in mind that the size of your finger may change depending on the time of day and temperature, so it’s best to measure your finger at the end of the day when it’s the largest.