Cut along the “Cut Slot” line to make a slit. Slip the pointed end of the paper ring sizer into the slit.

Place the paper ring sizer over the finger you want to measure. Gently pull the pointed end of the paper ring sizer to a snug-but-comfortable fit.

Note the number that lines up with the slit—this is your ring size.

Cut a small piece of non-stretchable string, thread, floss or ribbon. Wrap it snugly (but comfortably) around the base of the finger you want to measure.

With a marker or pen, carefully mark the spot where the string overlaps.

Lay the string flat. Use a ruler to measure the length between your marks (in millimeters). Divide that number by 3.14 to get the diameter.

Download and print the ring size chart using the button below.

Find a ring that already fits comfortably.

Lay it over each circle on the chart until you find your match. If you're between sizes, choose the larger one.