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International ring size conversion

FINGER CIRCUMFERENCE IN MM RING SIZE
EUROPE USA UK JAPAN
44 44 3 F 4
45 45 3 ½ G 5
47 47 4 H 7
48 48 4 ½ I 8
49 49 5 J 9
50 50 5 ½ K 10
52 52 6 L 12
53 53 6 ½ M 13
54 54 7 N-O 14
56 56 7 ½ P 16
57 57 8 Q 17
58 58 8 ½ R 18
60 60 9 S 20
61 61 9 ½ S ½ 21
62 62 10 T 22
63 63 10 ½ U 23
65 65 11 V 25
66 66 11 ½ W 26
67 67 12 X 27

 

To measure your ring size at home, wrap a thin strip of paper or non-stretch string around the base of your finger, making sure it’s snug but not tight. Mark where the ends meet, then measure the length in millimetres. Use a ring size chart to match the measurement to the closest ring size. For the most accurate result, measure at the end of the day when your fingers are at their largest, and avoid measuring when your hands are cold.

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