Kobelli Ring Size Chart


Methods for size conversion:

1. Use a string to wrap around the base of your finger. Stretch out the length of the string over a ruler and note the length in millimeters. A sewing tape measure will also do the trick. You can use this measurement to match to circumference in the chart below.

2. If you already have a ring that fits, or tested one at a local jeweler, get the inner diameter of the ring measured with a caliper rather than using a ring sizer or ring mandrel.
Finger Circumference
Millimeters
Inside Ring Diameter
Millimeters
USA/Canada Ring Size
47
15
4
48
15.3
4.5
49
15.7
5
50
16
5.5
52
16.5
6
53
17
6.5
54
17.3
7
55
17.7
7.5
57
18.2 (dime size)
8
58
18.5
8.5
59
19
9
61
19.5 (penny size)
9.5
62
20
10
63
20.2
10.5
64
20.7
11
66
21.0 (nickel size)
11.5
67
21.5
12
68
22
12.5
69
22.2
13