Ring Size Conversion Chart

Determining your ring size can be tricky without the proper tools. Use our Ring Size Conversion chart below to find your ring size in different countries. Need help? Speak with a Diamond Expert now by calling 866-737-0754.

Ring Diameter (MM) USA/Canada
United Kingdom
France
Germany
Japan
Switzerland
14.0 mm. 3 F 44 14 4 4
14.4 mm. G 45¼ 14½ 6⅓
14.8 mm. 4 46½ 15 7
15.2 mm. 47¾ 15¼ 8 8
15.6 mm. 5 49 15¾ 9
16.0 mm. L 50¾ 16 10½ 10¾
16.5 mm. 6 M 51½ 16½ 12 12¾
16.9 mm. N 52¾ 17 13 14
17.3 mm. 7 O 54 17¼ 14 15¼
17.7 mm. P 55¼ 17¾ 15 16½
18.2 mm. 8 Q 56¾ 18 16 17¾
18.6 mm. 58 18½ 17 18½
19.0 mm. 9 59¼ 19 18 20
19.4 mm. 60¾ 19½ 19 21
19.8 mm. 10 61¾ 20 20 21¾
20.2 mm. 10½ 62¾ 20¼ 22 22¾
20.6 mm. 11 64¼ 20¾ 23 24
21.0 mm. 11½ 66 21 24 25¾
21.4 mm. 12 Y 67¼ 21¼ 25 27½
21.8 mm. 12½ Z 68 21¾ 26 28¾
22.2 mm. 13 - 69 22 27 29¼
22.6 mm. 13½ - - - - -
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