Ring size chart

RING SIZE CHART
Inner diameter (mm) Circumference (mm) US Japan Uk
12.37 38.86 1 1 B
13.21 41.50 2 2 D
13.61 42.76 2 1/2 3 E
14.05 44.14 3 4 F
14.36 45.11 3 3/8 5 G
14.56 45.74 3 5/8 6 G 1/2
14.86 46.68 4 7 H 1/2
15.27 47.97 4 1/2 8 I 1/2
15.70 49.32 5 9 J 1/2
16.00 50.27 5 3/8 10 K 1/2
16.33 51.30 5 3/4 11 L
16.51 51.87 6 12 M
16.92 53.16 6 1/2 13 N
17.35 54.51 7 14 O
17.75 55.76 7 1/2 15 P
18.19 57.15 8 16 Q
18.53 58.21 8 1/2 17 Q 3/4
18.89 59.34 9 18 S
19.41 60.98 9 1/2 19 S 3/4
19.84 62.33 10 20 T 1/2
20.02 62.89 10 1/4 21 U
20.20 63.46 10 1/2 22 I 1/2
20.68 64.97 11 23 V 1/2
21.08 66.22 11 1/2 24 W 3/4
21.49 67.51 12 25 Y
21.89 68.77 12 1/2 26 Z
22.33 70.15 13 27 Z + 1