1 UK RING SIZING STICK A-Z+6 ALL UK SIZES
 
1 UK RING GAUGE SIZE WHOLE SIZES A-Z+6
 
EASY TO USE CONVERSION CHART, THEN YOU CAN SELL BUY AND SIZE IN ALL OF THE WORLDS DIFFERENT STANDARDS
 
British Size
Inside Ø mm
USA Size
Inside Ø mm
Japan Size
Inside Ø mm
European Size
Inside Circ. mm
A
11.97
0.5
11.97
 
 
 
 
B
12.36
1
12.37
1
13
1
41
C
12.75
1.5
12.78
2
13.33
2
42
D
13.14
2
13.21
3
13.66
3
43
E
13.53
2.5
13.61
4
14
4
44
F
13.92
3
14.05
5
14.33
5
45
G
14.31
3.5
14.45
6
14.66
6
46
H
14.7
4
14.86
7
15
7
47
I
15.09
4.5
15.27
8
15.33
8
48
J
15.48
5
15.7
9
15.66
9
49
K
15.87
5.5
16.1
10
16
10
50
L
16.26
6
16.51
11
16.33
11
51
M
16.65
6.5
16.92
12
16.66
12
52
N
17.04
7
17.35
13
17
13
53
O
17.45
7.5
17.75
14
17.33
14
54
P
17.86
8
18.19
15
17.66
15
55
Q
18.27
8.5
18.59
16
18
16
56
R
18.68
9
18.99
17
18.33
17
57
S
19.09
10
19.41
18
18.66
18
58
T
19.5
10.5
19.84
19
19
19
59
U
19.91
11
20.24
20
19.33
20
60
V
20.32
11.5
20.68
21
19.66
21
61
W
20.73
12
21.08
22
20
22
62
X
21.14
12.5
21.49
23
20.33
23
63
Y
21.55
13
21.89
24
20.66
24
64
Z
21.96
13.5
22.33
25
21
25
65
Z+1
22.29
 
 
26
21.33
26
66
Z+2
22.69
 
 
27
21.66
27
67
Z+3
23.06
 
 
 
 
28
68
Z+4
23.47
 
 
 
 
29
69
Z+5
23.87
 
 
 
 
30
70
Z+6
24.27
 
 
 
 
31
71
 
 
 
 
 
 
32
72
 
 
 
 
 
 
33
73
 
 
 
 
 
 
34
74
 
 
 
 
 
 
35
75
 
 
 
 
 
 
36
76