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Determine Your Ring Size with a String

Cut a small piece of string, thread or ribbon from a spool. Wrap it snugly around your finger for an accurate measurement. With a pen, mark the point on the string where the end meets. Stretch the string along a ruler and read the length and use the chart below to determine your ring size.

Tip: Be careful not to wrap the string too tight. Aim for a comfortable, snug fit.
For the most accuracy, have someone help you measure.
Double check for accuracy

Diameter (mm.) Diameter (in.) Size (U.S.)
49mm.
1.92 in.
5
51.5mm.
2.02 in.
6
54mm.
2.12 in.
7
56.6mm.
2.22 in.
8
59.1mm.
2.32 in.
9
61.6mm.
2.42 in.
10

International Ring Sizes

Circumference (mm.) Diameter (mm.) United States & Canada UK, Europe,& Australia Turkish
49.3
15.7
5
J½
9
51.5
16.5
6
L½
11
54
17.3
7
N½
13
57
18.2
8
P½
15
59.1
18.9
9
R½
17
61.6
19.8
10
T½
19

Determine Your Ring Size with an Existing Ring

Use a ring that fits you to determine your ring size. Measure diameter of inner edges of your ring and compare with the chart below.