Ring Size Chart

Inside diameter Inside circumference Sizes
(mm) (mm) United States Australia
11.63 36.5 0
11.84 37.2 ¼
12.04 37.8 ½ A
12.24 38.5 ¾
12.45 39.1 1 B
12.65 39.7
12.85 40.4 C
13.06 41
13.26 41.7 2 D
13.46 42.3
13.67 42.9 E
13.87 43.6
14.07 44.2 3 F
14.27 44.8
14.48 45.5 G
14.68 46.1
14.88 46.8 4 H
15.09 47.4
15.29 48 I
15.49 48.7 J
15.7 49.3 5
15.9 50 K
16.1 50.6
16.31 51.2 L
16.51 51.9 6
16.71 52.5 M
16.92 53.1
17.12 53.8 N
17.32 54.4 7
17.53 55.1 O
17.73 55.7
17.93 56.3 P
18.14 57 8
18.34 57.6 Q
18.54 58.3
18.75 58.9 R
18.95 59.5 9
19.15 60.2 S
19.35 60.8
19.56 61.4 T
19.76 62.1 10
19.96 62.7 10¼ U
20.17 63.4 10½
20.37 64 10¾ V
20.57 64.6 11
20.78 65.3 11¼ W
20.98 65.9 11½
21.18 66.6 11¾ X
21.39 67.2 12
21.59 67.8 12¼ Y
21.79 68.5 12½ Z
22 69.1 12¾
22.2 69.7 13
22.4 70.4 13¼ Z1
22.61 71 13½
22.81 71.7 13¾ Z2
23.01 72.3 14 Z3
23.22 72.9 14¼
23.42 73.6 14½ Z4
23.62 74.2 14¾
23.83 74.8 15
24.03 75.5 15¼
24.23 76.1 15½
24.43 76.8 15¾
24.64 77.4 16