Easy Ways to Measure Ring Size at Home

Ensure that your finger is at its normal size before taking a measurement. Cold weather can cause your fingers to shrink a bit, while heat or water retention caused by food, medications, or illness can cause finger swelling.

HOW DO I USE STRING OR PAPER AS A RING SIZER?

  • Take a piece of string, or a thin strip of paper and wrap it around your finger, close to the knuckle.
  • With a pen, carefully mark the spot where the string overlaps with its end.
  • Measure the string or paper with a ruler (mm).
  • Use the ring size chart below to determine your ring size.Pick the closest measurement on the ring size chart to find your ring size.

More Ring Sizing Tips: 

  • Stringcan stretch, so try not to pull them too taut. If you do, your measured ring finger size may be larger than your finger actually is, and any rings you purchase may be too big.
  • The ring should fit your finger comfortably: snug enough so it won't fall off, but loose enough to slide over your knuckle with relative ease.
  • When the knuckle is bigger than the base of the finger, measure both places and pick a size in between the two.
  • Measure your ring size at the end of the day when your fingers are warm. Finger size changes depending on the time of day and the weather, and your fingers are actually smaller in the early morning and in cold weather. Also, keep in mind that fingers on your dominant hand are usually larger.
  • Measure 3 to 4 times for more accuracy.

Measure a Ring You Already Have

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.

International Ring Size Chart

Inside Circumference US, Canada, Mexico UK, Australia, South Africa France Germany, Russia, Ukraine, Asia India, China, Japan, South America, Turkey Italy, Spain, Netherlands, Switzerland
IN MM
1.79 45.5 3.5 G 1/4 45.25 14.5 5 5.25
1.84 46.8 4 H 1/2 46.5 15 7 6.5
1.87
 
47.4 4.25 I 47.125 15.25 --- 7.125
1.89 48 4.5 I 1/2 47.75 15.5 8 7.75
1.92 48.7 4.75 J 1/4 48.375 --- --- 8.375
1.94 49.3 5 J 1/2 49 15.75 9 9
1.97 50 5.25 K 1/4 49.625 16 --- 9.625
1.99 50.6 5.5 L 50.25 16.25 10 10.25
2.02 51.2 5.75 L 1/4 50.875 --- 11 10.875
2.04 51.9 6 M 51.5 16.5 12 11.5
2.07 52.5 6.25 M 1/2 52.125 16.75 --- 12.125
2.09 53.1 6.5 N 52.75 17 13 12.75
2.12 53.8 6.75 N 1/2 53.375 --- --- 13.375
2.14 54.4 7 O 54 17.25 14 14
2.17 55.1 7.25 O 1/2 54.625 17.5 --- 14.625
2.19 55.7 7.5 P 55.25 17.75 15 15.25
2.22 56.3 7.75 P 1/2 55.875 --- --- 15.875
2.24 57 8 Q 56.5 18 16 16.5
2.27 57.6 8.25 Q 1/2 57.125 18.25 --- 7.125
2.29 58.3 8.5 Q 3/4 57.75 18.5 17 17.75
2.32 58.9 8.75 R 1/4 58.375 18.75 --- 18.375
2.34 59.5 9 R 3/4 59 19 18 19
2.37 60.2 9.25 S 1/4 59.625 19.25 --- 19.625
2.39 60.8 9.5 S 3/4 60.25 19.5 19 20.25
2.42 61.4 9.75 T 1/4 60.875 19.75 --- 20.875
2.44 62.1 10 T 1/2 61.5 20 20 21.25
2.47 62.7 10.25 U 62.125 20.25 21 22.125
2.49 63.4 10.5 U 1/2 62.75 20.5 22 22.75
2.52 64 10.75 V 1/4 63.375 --- --- 23.375
2.54 64.6 11 V 1/2 64 20.75 23 24
2.57 65.3 11.25 W 1/4 64.625 --- --- 24.625
2.59 65.9 11.5 W 3/4 65.25 21 24 25.25
2.62 66.6 11.75 X 1/4 65.875 --- --- 25.875
2.65 67.2 12 Y 66.5 21.25 25 26.5
2.68 68.1 12.25 Y 1/2 67.125 21.5 --- 27.125
2.71 68.5 12.5 Z 67.75 21.75 26 27.75
2.72 69.1 12.75 Z + 1/2 68.375 --- --- 28.375
2.75 69.7 13 Z + 1 69 22 27 2



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