1. Wrap a thin strip of paper around the base of your finger. If you have larger knuckles, measure both. (You may want to choose a size between the two to allow the ring to slip on comfortably.)
  2. Mark the spot where the paper meets
  3. Measure the paper's distance with a ruler
  4. Use the chart to determine ring size. To size a ring you already have, lay it directly onto the chart so the black circle touches the ring's inner circle.