Captive rings are a popular type of body jewelry that can be used for various piercings, including ears, nose, and even navel piercings. To ensure that you purchase the right size captive ring for your specific piercing, it is essential to measure your piercing accurately. Here are the steps to follow:

Wash your hands and the piercing area thoroughly with soap and water or a saline solution.

Use a pair of calipers, which are a type of measuring tool, to measure the diameter of your piercing. Place one end of the calipers against the entry point of the piercing and the other end against the exit point.

Record the measurement in millimeters.

Choose a captive ring that has a diameter that matches the measurement of your piercing. Captive rings typically come in a range of sizes, so be sure to choose the size that is closest to your measurement.

If you are unsure about the size of your piercing or how to measure it accurately, it is recommended that you seek the assistance of a professional piercing artist.