Ring size guide

Find your ring size
in 4 easy steps

International Ring Size Conversion Chart

Inside Diameter

(mm)

Inside Circumference

(mm)

Australian & UK

 

US & Canada

 
12.78 40.15 C 1 1/2
13.00 40.84 C 1/2
1 3/4
13.21 41.50 D 2
13.41 42.13 D 1/2 2 1/4
13.61 42.76 E 2 1/2
13.83 43.45 E1/2 2 3/4
14.05 44.14 F 3
14.15 44.45 F1/2 3 1/8
14.36 45.11 G 3 3/8
14.56 45.74 G 1/2 3 5/8
14.65 46.02 H 3 3/4
14.86 46.68
H 1/2 		4
15.04 47.25 I 4 1/4
15.27 47.97 I 1/2 4 1/2
15.40 48.38 J 4 5/8
15.70 49.32 J 1/2 5
15.80 49.64 K 5 1/8
16.00 50.27 K 1/2 5 3/8
16.10 50.58 L 5 1/2
16.41 51.55 L 1/2 5 7/8
16.51 51.87 M 6
16.71 52.50 M 1/2 6 1/4
16.92 53.16 N 6 1/2
17.13 53.82 N 1/2 6 3/4
17.35 54.51 O 7
17.45 54.82 O 1/2 7 1/4
17.75 55.76 P 7 1/2
17.97 56.45 P 1/2 7 3/4
18.19 57.15 Q 8
18.35 57.65 Q 1/2 8 1/4
18.61 58.47 R 8 5/8
18.80 59.06 R 1/2 8 7/8
19.10 60.00 S 9 1/8
19.31 60.66 S 1/2 9 3/8
19.51 61.29 T 9 5/8
19.84 62.33 T 1/2 10
20.02 62.89 U 10 1/4
20.20 63.46 U 1/2 10 1/2
20.32 63.84 V 10 5/8
20.68 64.97 V 1/2 11
20.76 65.22 W 11 1/8
20.94 65.78 W 1/2 11 3/8
21.18 66.54 X 11 5/8