How to Measure Ring Size
Find your exact ring size at home in 4 easy steps.
⚡Quick Answer
Wrap a strip of paper around your finger, mark the overlap, and measure the length in millimeters. Then match that number to a standard ring size chart to find your exact size.
Step-by-Step Guide
Wrap a Strip Around Your Finger
Cut a thin strip of paper or use a piece of string and wrap it snugly around the base of the finger you want to size. Make sure the strip sits flat against your skin without gaps — the fit should mimic how a ring would sit.
Mark the Overlap
Use a pen or fine marker to mark exactly where the strip overlaps itself. Precision matters here — even a millimeter off can push you into the wrong size, so mark clearly and avoid guessing.
Measure the Length in mm
Lay the strip flat on a hard surface and measure the distance from the end to your mark using a ruler in millimeters. This measurement is your finger's circumference, which is what ring size charts use.
Match to a Ring Size Chart
Find your circumference in a standard ring size chart to get your size (e.g., 57 mm = US size 8, 52 mm = US size 6). If you're shopping internationally, note that US, EU, and UK systems all differ — use a multi-system chart to be safe.
Frequently Asked Questions
What if I'm between sizes?
Always **size up** — a slightly loose ring is easier to resize than one that's too tight. A jeweler can typically tighten a ring one half-size down, but stretching a ring larger is more difficult and can weaken the metal.
Does finger size change?
Yes, fingers can **swell with heat, exercise, or pregnancy** and shrink in cold weather, so always measure under normal, room-temperature conditions. If your size varies noticeably throughout the day, measure at two different times and choose the average.
Can I measure a ring I already own?
Yes — place the ring on a ruler and measure the **inner diameter in mm**, then compare it to a size chart. Alternatively, trace the inner circle on paper and measure the diameter across the widest point for the same result.
Is string or paper more accurate?
**Paper strips** tend to be more accurate because they lie flat and don't stretch the way string can. If you use string, pull it taut but not tight when wrapping, and transfer the mark to a flat paper strip before measuring with your ruler.