There are several ways to find out your ring size:

1. Measure an Existing Ring – Use a ruler to measure the inner diameter of a ring you already own, ideally one with a similar width to the ring you want to buy.

2. Use String or Ribbon – Wrap a piece of string, ribbon, or cord around your finger, measure the length in millimeters, and divide it by 3.14 to get the inner diameter in millimeters — this is your ring size.

3. Visit a Jewelry Store – Try on rings of a similar width at any jewelry store or use a ring sizer, which many stores have. A salesperson can help you find the right size.

Keep in mind that different fingers may have different sizes.