Do you have a ring size conversion chart to help determine the correct size to order?

You will find this chart handy if you know the equivalent size in your country and need to convert to the US size, or if you can carefully measure the diameter of a ring or circumference of the finger.
International Ring Size Chart
Circumference Diameter UK, Europe, United States CN/SG/JP HK Switzerland
(mm) (mm) & Australia & Canada
44.2 14.1 F 3 4 6 4
44.8 14.3 5
45.5 14.5 G 7.5
46.1 14.7 6
46.8 14.9 H 4 7 9
47.4 15.1
48 15.3 I 8 10
48.7 15.5 J 9
49.3 15.7 5 9 11
50 15.9 K 10
50.6 16.1 10 12
51.2 16.3 L 11¾
51.9 16.5 6 11 13 12¾
52.5 16.7 M 12
53.1 16.9 13 14.5 14
53.8 17.1 N
54.4 17.3 7 14 16 15¼
55.1 17.5 O
55.7 17.7 15 17 16½
56.3 17.9 P
57 18.1 8 16 17¾
57.2 18.2 18
57.6 18.3 Q
58.3 18.5 17 19
58.9 18.8 R 19
59.5 19 9 18 20.5
60.2 19.2 S 20¼
60.8 19.4 19 22
61.4 19.6 T 21½
62.1 19.8 10 20 23
62.7 20 U 21
63.4 20.2 10½ 22 24 22¾
64 20.4 V
64.6 20.6 11 23 25
65.3 20.8 W 25
65.9 21 11½ 24 26
66.6 21.2 X
67.2 21.4 12 25 27.75 27½
67.8 21.6 Y
68.5 21.8 Z 12½ 26 28¾
69.1 22
69.7 22.2 13 27 30
70.4 22.4 Z+1
71 22.6 13½

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