You only need a thin strip of paper, a pen, and a ruler: Wrap the paper around the base of your finger and mark the point where the ends meet. Then lay the paper flat and measure its length in millimeters (mm). Compare this measurement with a ring size chart to determine your size. If your measurement falls between two sizes, choose the larger one for a more comfortable fit.
Find your ring size
For better accuracy, measure your finger at the end of the day and avoid measuring when your hands are cold, as this can affect the result. Keep in mind that thicker rings tend to feel tighter, so you may need to choose one size larger. For the most precise measurement, you can also visit a jeweler to have your finger professionally measured.