Option 1: Measure Your Finger

What you’ll need: A strip of paper or ribbon + a ruler

  1. Wrap the paper or ribbon around your finger (not too tight).

  2. Mark where the ends meet.

  3. Lay it flat and measure the length in millimeters (mm).

  4. Match your measurement to the chart below.

  5. If you’re between sizes, go up one size — especially for wider or thicker rings.

Ring Size

3

4

5

6

7

8

9

Finger Measurement (mm)

44.2

46.8

49.3

51.8

54.4

56.9

59.5

 

 

Option 2: Use a Ring You Already Own

If you have a ring that fits well:

  1. Place it on a flat surface.

  2. Measure straight across the inside of the ring (edge to edge) in millimeters.

  3. Match that number to the chart below.

Ring Size

3

4

5

6

7

8

9

Inside Diameter (mm)

14.1

14.9

15.6

16.45

17.3

18.2

19.0