Please be careful not to drop or apply pressure to the surface or corners, as this may cause dents or deformation.
DELIVERY
Ships within 3–14 business days of your order. Business days are weekdays, excluding weekends and public holidays.
If orders exceed the available quantity, additional production may extend the dispatch time. We may temporarily pause orders while exhibiting at events.
ABOUT RING SIZE
Number,Circumference,Diameter Ring size conversion chart with inner circumferences and diameters
Japan (JCS)
Japanese Standards (number)
ID (mm)
Inner diameter (mm)
Circ. (mm)
Inner circumference (mm)
ISO
International Standards
USA
CAN
UK
AUS
NER
-3
11 2/3
36.6
-2
12
37.7
-1
12 1/3
38.7
0
12 2/3
39.8
1
13
40.8
41
1
C
2
13 1/3
41.9
42
2
D
3
13 2/3
42.9
43
2.5
E
4
14
44.0
44
3
F
5
14 1/3
45
45
3.5
G
6
14 2/3
46.1
46
3.5-4
G–H
7
15
47.1
47
4-4.5
H–I
8
15 1/3
48.2
48
4.5-5
I–J
9
15 2/3
49.2
49
5
J
10
16
50.3
50
5.5
K
11
16 1/3
51.3
51
6
L
12
16 2/3
52.4
52
6.5
L–M
13
17
53.4
53
6.5-7
M–N
14
17 1/3
54.5
54
7-7.5
N–O
15
17 2/3
55.5
55
7.5-8
O–P
16
18
56.5
56
8
P
17
18 1/3
57.6
57
8.5
Q
18
18 2/3
58.6
58
9
R
19
19
59.7
59
9.5
S
20
19 1/3
60.7
60
10
T
21
19 2/3
61.7
61
10-10.5
T–U
22
20
62.8
62
10.5
U
23
20 1/3
63.8
63
11
V
24
20 2/3
64.9
64
11.5
W
25
21
65.9
65
12
X
26
21 1/3
66.9
66
Y
27
21 2/3
68.0
67
Z
28
22
69.0
68
29
22 1/3
70.1
69
30
22 2/3
71.1
70
(*ID= Inner Diameter Circ.=Inner Circumference ) Ring gauge rental service available here
