International Finger Size Chart - The Ross Jewelry Company
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We receive questions about finger size conversions from all over the world.  After a worldwide search for charts and information about finger sizing in various countries, we have adapted the chart below . . . which converts Great Britain, European, and Japanese finger sizes to standard sizing used in the United States.  This chart should help you convert ring sizes to the exact size or be very close.  We hope this information is helpful.
Warm regards from Atlanta, Georgia U.S.A.

Find Your Converted Finger Size on the Chart Below

EnglandEuropeJapanUSADiameterCircumference
   
0
11.54
36.25
A
   
11.90
37.38
  
0
 
12.00
37.70
A1/2
   
12.10
38.01
B
   
12.30
38.64
   
1
12.37
38.86
B1/2
   
12.50
39.27
   
11/4
12.58
39.52
C
   
12.70
39.90
 
0.15
 
11/2
12.78
40.15
C1/2
0.53
  
12.90
40.53
 
0.84
1
13/4
13.00
40.84
 
1.00
  
13.05
41.00
D
1.15
  
13.10
41.15
 
1.50
 
2
13.21
41.50

EnglandEuropeJapanUSADiameterCircumference
D1/2
1.78
  
13.30
41.78
 
1.88
2
 
13.33
41.88
 
2.00
  
13.37
42.00
 
2.13
 
21/4
13.41
42.13
E
2.41
  
13.50
42.41
 
2.76
 
21/2
13.61
42.76
 
2.91
3
 
13.66
42.91
E1/2
3.00
  
13.69
43.00
 
3.42
 
23/4
13.82
43.42
F
3.67
  
13.90
43.67
 
3.98
4
 
14.00
43.98
 
4.00
  
14.01
44.00
 
4.14
 
3
14.05
44.14

EnglandEuropeJapanUSADiameterCircumference
F1/2
4.30
  
14.10
44.30
 
4.74
 
31/4
14.24
44.74
G
4.92
  
14.30
44.92
 
5.00
  
14.32
45.00
 
5.02
5
 
14.33
45.02
 
5.40
 
31/2
14.45
45.40
G1/2
5.55
  
14.50
45.55
 
6.00
  
14.64
46.00
 
6.02
 
33/4
14.65
46.02
 
6.06
6
 
14.66
46.06
H
6.18
  
14.70
46.18
 
6.68
 
4
14.86
46.68

EnglandEuropeJapanUSADiameterCircumference
H1/2
6.81
  
14.90
46.81
 
7.00
  
14.96
47.00
 
7.12
7
 
15.00
47.12
 
7.34
 
41/4
15.07
47.34
I
7.44
  
15.10
47.44
 
7.97
 
41/2
15.27
47.97
 
8.00
  
15.28
48.00
I1/2
8.07
  
15.30
48.07
 
8.16
8
 
15.33
48.16
 
8.63
 
43/4
15.48
48.63
J
8.69
  
15.50
48.69
 
9.00
  
15.60
49.00
 
9.20
9
 
15.66
49.20

EnglandEuropeJapanUSADiameterCircumference
J1/2
9.32
 
5
15.70
49.32
K
9.95
 
51/4
15.90
49.95
 
10.00
  
15.92
50.00
 
10.27
10
 
16.00
50.27

EnglandEuropeJapanUSADiameterCircumference
K1/2
10.58
 
51/2
16.10
50.58
 
11.00
  
16.23
51.00
L
11.24
 
53/4
16.31
51.24
 
11.30
11
 
16.33
51.30
L1/2
11.87
 
6
16.51
51.87
 
12.00
  
16.55
52.00
 
12.34
12
 
16.66
52.34
M
12.46
  
16.70
52.46
 
12.56
 
61/4
16.73
52.56
 
13.00
  
16.87
53.00

EnglandEuropeJapanUSADiameterCircumference
M1/2
13.09
  
16.90
53.09
 
13.16
 
61/2
16.92
53.16
 
13.41
13
 
17.00
53.41
N
13.72
  
17.10
53.72
 
13.85
 
63/4
17.14
53.85
 
14.00
  
17.19
54.00
N1/2
14.35
  
17.30
54.35
 
14.44
14
 
17.33
54.44
 
14.51
 
7
17.35
54.51
O
14.98
  
17.50
54.98
 
15.00
 
71/4
17.56
55.00
 
15.48
15
 
17.66
55.48

EnglandEuropeJapanUSADiameterCircumference
O1/2
15.61
  
17.70
55.61
 
15.76
 
71/2
17.76
55.76
 
16.00
  
17.83
56.00
P
16.23
  
17.90
56.23
 
16.45
 
73/4
17.97
56.45
 
16.55
16
 
18.00
56.55
P1/2
16.86
  
18.10
56.86
 
17.00
  
18.14
57.00
 
17.15
 
8
18.19
57.15
Q
17.49
  
18.30
57.49
 
17.59
17
 
18.33
57.59
 
17.77
 
81/4
18.39
57.77
 
18.00
  
18.46
58.00

EnglandEuropeJapanUSADiameterCircumference
Q1/2
18.12
  
18.50
58.12
 
18.40
 
81/2
18.59
58.40
 
18.62
18
 
18.66
58.62
R
183/4
  
18.70
58.77
 
19.00
 
83/4
18.78
59.00
R1/2
19.38
  
18.90
59.38
 
19.66
 
9
18.99
59.66
 
19.69
19
 
19.00
59.69
S
20.00
  
19.10
60.00
 
20.38
 
91/4
19.22
60.38
S1/2
20.63
  
19.30
60.63
 
20.73
20
 
19.33
60.73
 
20.98
 
91/2
19.41
60.98
 
21.00
  
19.42
61.00

EnglandEuropeJapanUSADiameterCircumference
T
21.26
  
19.50
61.26
 
21.67
 
93/4
19.63
61.67
 
21.76
21
 
19.66
61.76
T1/2
21.89
  
19.70
61.89
 
22.00
  
19.74
62.00
 
22.33
 
10
19.84
62.33
U
22.52
  
19.90
62.52
 
22.83
22
 
20.00
62.83
 
23.00
 
101/4
20.05
63.00
U1/2
23.15
  
20.10
63.15
 
23.59
 
101/2
20.24
63.59

EnglandEuropeJapanUSADiameterCircumference
V
23.77
  
20.30
63.77
 
23.87
23
 
20.33
63.87
 
23.99
  
20.37
63.99
 
24.28
 
103/4
20.46
64.28
V1/2
24.40
  
20.50
64.40
 
24.91
24
 
20.66
64.91
 
24.97
 11
20.68
64.97
W
25.00
  
20.69
65.00
 
25.60
 
111/4
20.88
65.60

EnglandEuropeJapanUSADiameterCircumference
W1/2
25.66
  
20.90
65.66
 
25.97
25
 
21.00
65.97
 
26.00
  
21.01
66.00
 
26.22
 
111/2
21.08
66.22
X
26.29
  
21.10
66.29

EnglandEuropeJapanUSADiameterCircumference
X1/2
26.92
 
103/4
21.30
66.92
 
27.01
26
 
21.33
67.01
Y
27.51
 
12
21.49
67.51
 
28.02
  
21.65
68.02
 
28.05
27
 
21.66
68.05

EnglandEuropeJapanUSADiameterCircumference
Y1/2
28.20
 
121/4
21.71
68.20
Z
28.77
 
121/2
21.89
68.77
 
28.99
  
21.96
68.99
 
29.12
28
 
22.00
69.12

EnglandEuropeJapanUSADiameterCircumference
Z1/2
29.43
  
22.10
69.43
 
29.49
 
123/4
22.12
69.49
Z+1
29.99
  
22.28
69.99
 
30.15
29
13
22.33
70.15
Z+11/2
30.69
  
22.50
70.69
 
30.81
 
131/4
22.54
70.81
 
31.00
  
22.60
71.00
 
31.19
30
 
22.66
71.19
Z+2
31.31
  
22.70
71.31
 
31.47
 
131/2
22.77
71.47

EnglandEuropeJapanUSADiameterCircumference
Z+21/2
32.01
 
133/4
22.92
72.01
 
32.26
31
 
23.00
72.26

EnglandEuropeJapanUSADiameterCircumference
Z+3
32.57
  
23.10
72.57
 
32.76
 
14
23.16
72.76
 
33.01
  
23.24
73.01
Z+31/2
33.20
  
23.30
73.20
 
33.32
  
23.34
73.32
 
33.29
32
 
23.33
73.29
 
33.42
 
141/4
23.37
73.42
Z+4
33.83
  
23.50
73.83
 
33.98
 
141/2
23.55
73.98
 
34.33
33
 
23.66
74.33
Z+41/2
34.46
  
23.70
74.46
 
34.71
 
143/4
23.78
74.71
 
34.99
  
23.87
74.99

EnglandEuropeJapanUSADiameterCircumference
Z+5
35.08
  
23.90
75.08
 
35.40
34
15
24.00
75.40
Z+51/2
35.71
  
24.10
75.71
 
36.00
 
151/4
24.19
76.00
Z+6
36.34
  
24.30
76.34
 
36.43
35
 
24.33
76.43
 
36.69
 
151/2
24.41
76.69
Z+61/2
37.00
  
24.51
77.00
 
37.31
 
153/4
24.61
77.31
 
37.47
36
 
24.66
77.47
Z+7
37.60
  
24.70
77.60
 
38.00
 
16
24.83
78.00
Z+71/2
38.23
  
24.90
78.23
 
38.54
37
161/4
25.00
78.54


Technical Information:
Diameter = Internal diameter in millimeters.
Circumference = Internal circumference in millimeters.

Loose Diamonds Atlanta - The Ross Jewelry Company
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