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How to find your ring size

Do you know how to quickly find out your ring size?

Ring sizes based on finger circumference. How to measure the circumference of your finger? Use a piece of string or thread and wrap it around your finger where you would wear the ring. Cross the string on the inner side of your finger so that it wraps snugly, and mark the point of crossing on both sides of the string with a pen. When you stretch the string, you will see two marks — use a ruler to measure the distance between them to get the circumference. Using the table below, you can easily determine your ring size.

Determine the size from a ring that fits you well.

Measure its inner diameter and use the table below. You can also easily determine your size from the inner diameter.

Ring Size Chart

Size
circumference (mm)

Diameter (mm)

USA

Japan

United Kingdom

Germany

Switzerland

48 15.27 4 1/2 8 I - 1/2 15 1/4 --
49 15.70 5 9 J 1/2 15 3/4 --
51 16.10 5 1/2 11 L 16 11 3/4
52 16.51 6 12 M 16 1/2 12 3/4
53 16.92 6 1/2 13 N 17 14
55 17.35 7 14 O 17 1/4 15 1/4
56 17.75 7 1/2 15 P 17 3/4 16 1/2
57 18.19 8 16 Q 18 17 3/4
58 18.53 8 1/2 17 Q 1/2 18 1/2 --
59 18.89 9 18 R 1/2 19 --
61 19.41 9 1/2 19 S 1/2 19 1/2 --
62 19.84 10 20 T 1/2 20 --
63 20.20 10 1/2 22 U 1/2 20 1/4 --
65 20.68 11 23 V 1/2 20 3/4 --
66 21.08 11 1/2 24 W 1/2 21 --
68 21.49 12 25 Y 21 1/4 27 1/2
69 21.89 12 1/2 26 Z 21 3/4 28 3/4
70 22.33 13 27 -- 22 --

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