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Ring Sizer

Find your perfect fit

Measure an Existing Ring


  1. 1.
    Select an existing ring that fits the desired finger.
  2. 2.
    Measure the internal diameter of the ring (in mm).
  3. 3.
    Use the below chart to determine your ring size.
Internal Diameter (mm)US/CANUK/AUSGerman
14.1 mm3F14
14.5 mm3.5G14.5
14.9 mm4H 1/215
15.3 mm4.5I 1/215.25
15.7 mm5J 1/215 3/4
16.1 mm5.5K 1/216
16.5 mm6L 1/216 1/2
16.9 mm6.5M 1/216.75
17.3 mm7O17 1/4
17.7 mm7.5P17.75
18.1 mm8Q18
18.5 mm8.5R18.5
19 mm9S19
19.4 mm9.5T19.5
19.8 mm10U19 3/4
20.2 mm10.5V20.25
20.6 mm11W20 1/2
21.0 mm11.5X21
21.4 mm12Y21 1/2
21.8 mm12.5Z22
22.2 mm13Z 122.25

Measure Your Finger

  1. 1.
    Wrap a strip of paper around your finger where you’d like your ring to be.
  2. 2.
    Make sure that the paper is pulled snug to your finger, the tighter the better, to find your best fit.
  3. 3.
    Mark the spot where the paper meets and measure the distance with a ruler (mm).
  4. 4.
    Use the below chart to determine your ring size.
Circumference (mm)US/CAN Ring SizeUK/AUS Ring SizeGerman Ring Size
44.23F14
45.553.5G14.5
46.84H 1/215
48.074.5I 1/215.25
49.35J 1/215 3/4
50.565.5K 1/216
51.96L 1/216 1/2
53.086.5M 1/216.75
54.47O17 1/4
55.67.5P17.75
57.08Q18
58.128.5R18.5
59.59S19
60.949.5T19.5
62.110U19 3/4
63.4510.5V20.25
64.611W20 1/2
65.9711.5X21
67.212Y21 1/2
68.4912.5Z22
69.7613Z 122.25
Tips & Tricks


Measure your fingers at the end of the day when they’re at their largest.

Cold weather can shrink your fingers up to half a size, so make sure they’re warm.

Lastly, alcohol and salt can make your fingers swell, so refrain from measuring them after cocktails and appetizers.


Still Unsure?

Our Customer Happiness team can help with any other questions you have about finding your best fit. Reach out to us here.