If you have a ring that already fits your finger well, you can use a ruler to measure the inside diameter of this ring:
- Take your ruler and measure straight across the inside of the ring from edge to edge.
- Take the diameter measurement in millimeters, and then use our measurement-conversion chart to find your ring size.
How do you size a ring at home?
You can measure your ring size using either string or, perhaps a more common item in your home, floss. Take one of these measurement tools and wrap it around the base of your finger, marking where the string or floss first overlaps with a pen. Then, line that up with a ruler and take down its length in millimeters.
How is ring size calculated?
Wrap string or paper around the base of your finger. Mark the point where the ends meet with a pen. Measure the string or paper with a ruler (mm). Pick the closest measurement on the ring size chart to find your ring size.
