|
Inside Circumference
|
Number Sizes
|
|
inches
|
mm
|
US / Canada
(Standard)
|
UK / Irish / Australia
(Esquivalent)
|
Japanese
(Esquivalent)
|
Swiss
(Esquivalent)
|
|
1.438
|
36.5
|
0
|
|
|
|
|
1.463
|
37.2
|
1/4
|
|
|
|
|
1.488
|
37.8
|
1/2
|
A
|
|
|
|
1.513
|
38.4
|
3/4
|
A 1/2
|
|
|
|
1.539
|
39.1
|
1
|
B
|
1
|
|
|
1.564
|
39.7
|
1 1/4
|
B 1/2
|
|
|
|
1.589
|
40.4
|
1 1/2
|
C
|
|
|
|
1.614
|
41.0
|
1 3/4
|
C 1/2
|
|
|
|
1.639
|
41.6
|
2
|
D
|
2
|
1.50
|
|
1.664
|
42.3
|
2 1/4
|
D 1/2
|
|
|
|
1.689
|
42.9
|
2 1/2
|
E
|
3
|
2.75
|
|
1.714
|
43.5
|
2 3/4
|
E 1/2
|
|
|
|
1.740
|
44.2
|
3
|
F
|
4
|
4.00
|
|
1.765
|
44.8
|
3 1/4
|
F 1/2
|
5
|
5.25
|
|
1.790
|
45.5
|
3
|
1/2
|
G
|
|
|
1.815
|
46.1
|
3 3/4
|
G 1/2
|
6
|
6.50
|
|
1.840
|
46.7
|
4
|
H
|
7
|
|
|
1.865
|
47.4
|
4 1/4
|
H 1/2
|
7.75
|
|
|
1.890
|
48.0
|
4 1/2
|
I
|
8
|
|
|
1.915
|
48.7
|
4 3/4
|
J
|
|
9.00
|
|
1.941
|
49.3
|
5
|
J 1/2
|
9
|
|
|
1.966
|
49.9
|
5 1/4
|
K
|
|
10.00
|
|
1.991
|
50.6
|
5 1/2
|
K 1/2
|
10
|
|
|
2.016
|
51.2
|
5 3/4
|
L
|
|
11.75
|
|
2.041
|
51.8
|
6
|
L 1/2
|
11
|
12.75
|
|
2.066
|
52.5
|
6 1/4
|
M
|
12
|
|
|
2.091
|
53.1
|
6 1/2
|
M 1/2
|
13
|
14.00
|
|
2.116
|
53.8
|
6 3/4
|
N
|
|
|
|
2.141
|
54.4
|
7
|
N 1/2
|
14
|
15.25
|
|
2.167
|
55.0
|
7 1/4
|
O
|
|
|
|
2.192
|
55.7
|
7 1/2
|
O 1/2
|
15
|
16.50
|
|
2.217
|
56.3
|
7 3/4
|
P
|
|
|
|
2.242
|
56.9
|
8
|
P 1/2
|
16
|
17.75
|
|
2.267
|
57.6
|
8 1/4
|
Q
|
|
|
|
2.292
|
58.2
|
8 1/2
|
Q 1/2
|
17
|
|
|
2.317
|
58.9
|
8 3/4
|
R
|
|
19
|
|
2.342
|
59.5
|
9
|
R 1/2
|
18
|
|
|
2.368
|
60.1
|
9 1/4
|
S
|
|
20.25
|
|
2.393
|
60.8
|
9 1/2
|
S 1/2
|
19
|
|
|
2.418
|
61.4
|
9 3/4
|
T
|
|
21.5
|
|
2.443
|
62.1
|
10
|
T 1/2
|
20
|
|
|
2.468
|
62.7
|
10 1/4
|
U
|
21
|
|
|
2.493
|
63.3
|
10 1/2
|
U 1/2
|
22
|
22.75
|
|
2.518
|
64.0
|
10 3/4
|
V
|
|
|
|
2.543
|
64.6
|
11
|
V 1/2
|
23
|
|
|
2.569
|
65.2
|
11 1/4
|
W
|
|
25
|
|
2.594
|
65.9
|
11 1/2
|
W 1/2
|
24
|
|
|
2.619
|
66.5
|
11 3/4
|
X
|
|
|
|
2.644
|
67.2
|
12
|
X 1/2
|
25
|
27.50
|
|
2.669
|
67.8
|
12 1/4
|
Y
|
|
|
|
2.694
|
68.4
|
12 1/2
|
Z
|
26
|
28.75
|
|
2.719
|
69.1
|
12 3/4
|
Z 1/2
|
|
|
|
2.744
|
69.7
|
13
|
|
27
|
|
|
2.769
|
70.3
|
13 1/4
|
Z1
|
|
|
|
2.795
|
71.0
|
13 1/2
|
|
|
|
|
2.820
|
71.6
|
13 3/4
|
Z2
|
|
|
|
2.845
|
72.3
|
14
|
Z3
|
|
|
|
2.870
|
72.9
|
14 1/4
|
|
|
|
|
2.895
|
73.5
|
14 1/2
|
Z4
|
|
|
|
2.920
|
74.2
|
14 3/4
|
|
|
|
|
2.945
|
74.8
|
15
|
|
|
|
|
2.970
|
75.4
|
15 1/4
|
|
|
|
|
2.996
|
76.1
|
15 1/2
|
|
|
|
|
3.021
|
76.7
|
15 3/4
|
|
|
|
|
3.046
|
77.4
|
16
|
|
|
|
|
2.644
|
67.2
|
12
|
X 1/2
|
|
|
|
2.669
|
67.8
|
12 1/4
|
Y
|
|
|
|
2.694
|
68.4
|
12 1/2
|
Z
|
|
|
|
2.719
|
69.1
|
12 3/4
|
Z 1/2
|
|
|
|
2.744
|
69.7
|
13
|
|
|
|
|
2.769
|
70.3
|
13 1/4
|
Z1
|
|
|
|
2.795
|
71.0
|
13 1/2
|
|
|
|
|
2.820
|
71.6
|
13 3/4
|
Z2
|
|
|
|
2.845
|
72.3
|
14
|
Z3
|
|
|
|
2.870
|
72.9
|
14 1/4
|
|
|
|
|
2.895
|
73.5
|
14 1/2
|
Z4
|
|
|
|
2.920
|
74.2
|
14 3/4
|
|
|
|
|
2.945
|
74.8
|
15
|
|
|
|
|
2.970
|
75.4
|
15 1/4
|
|
|
|
|
2.996
|
76.1
|
15 1/2
|
|
|
|
|
3.021
|
76.7
|
15 3/4
|
|
|
|
|
3.046
|
77.4
|
16
|
|
|
|
|
3.071
|
78.0
|
16 1/4
|
|
|
|
|
3.096
|
78.6
|
16 1/2
|
|
|
|
|
3.121
|
79.3
|
16 3/4
|
|
|
|
|
3.146
|
79.9
|
17
|
|
|
|
|
3.171
|
80.6
|
17 1/4
|
|
|
|
|
3.197
|
81.2
|
17 1/2
|
|
|
|
|
3.222
|
81.8
|
17 3/4
|
|
|
|
|
3.247
|
82.5
|
18
|
|
|
|
|
3.272
|
83.1
|
18 1/4
|
|
|
|
|
3.297
|
83.7
|
18 1/2
|
|
|
|
|
3.322
|
84.4
|
18 3/4
|
|
|
|
|
3.347
|
85.0
|
19
|
|
|
|
|
3.372
|
85.7
|
19 1/4
|
|
|
|
|
3.397
|
86.3
|
19 1/2
|
|
|
|
|
3.423
|
86.9
|
19 3/4
|
|
|
|
|
3.448
|
87.6
|
20
|
|
|
|
|
3.473
|
88.2
|
20 1/4
|
|
|
|
|
3.498
|
88.8
|
20 1/2
|
|
|
|
|
3.523
|
89.5
|
20 3/4
|
|
|
|
|
3.548
|
90.1
|
21
|
|
|
|
|
3.573
|
90.8
|
21 1/4
|
|
|
|
|
3.598
|
91.4
|
21 1/2
|
|
|
|
|
3.624
|
92.0
|
21 3/4
|
|
|
|
|
3.649
|
92.7
|
22
|
|
|
|
|
3.674
|
93.3
|
22 1/4
|
|
|
|
|
3.699
|
94.0
|
22 1/2
|
|
|
|
|
3.724
|
94.6
|
3/4
|
|
|
|
|
3.749
|
95.2
|
23
|
|
|
|
|
3.774
|
95.9
|
23 1/4
|
|
|
|
|
3.799
|
96.5
|
23 1/2
|
|
|
|
|
3.825
|
97.1
|
23 3/4
|
|
|
|
|
3.850
|
97.8
|
24
|
|
|
|
|
3.875
|
98.4
|
24 1/4
|
|
|
|
|
3.900
|
99.1
|
24 1/2
|
|
|
|
|
3.925
|
99.7
|
24 3/4
|
|
|
|
|
3.950
|
100.3
|
25
|
|
|
|
|
3.975
|
101.0
|
25 1/4
|
|
|
|
|
4.000
|
101.6
|
25 1/2
|
|
|
|
|
4.025
|
102.2
|
25 3/4
|
|
|
|
|
4.051
|
102.9
|
26
|
|
|
|
|
4.076
|
103.5
|
26 1/4
|
|
|
|
|
-
The ring conversion chart shows the relative sizes and lengths in inches and millimeters.
-
The chart should be read from left to right to find your appropriate ring size.
-
Our rings are made at a US 7 (UK N1/2), we need to resize or remake rings ordered at other sizes.
|
