Ring Size Guide
Diameter by size:


Complete size guide:
Circumference

______________________________________
|
Size (website, USA)
|
Size (UK)
|
Diameter
|
Circumference
|
|---|---|---|---|
|
3
|
F
|
14.0 mm
|
44.0 mm
|
|
3.5
|
G
|
14.4 mm
|
45.2 mm
|
|
4
|
H1/2
|
14.8 mm
|
46.4 mm
|
|
4.5
|
I1/2
|
15.2 mm
|
47.7 mm
|
|
5
|
J1/2
|
15.6 mm
|
48.9 mm
|
|
5.5
|
L
|
16.0 mm
|
50.2 mm
|
|
6
|
M
|
16.5 mm
|
51.8 mm
|
|
6.5
|
N
|
16.9 mm
|
53.1 mm
|
|
7
|
O
|
17.3 mm
|
54.4 mm
|
|
7.5
|
P
|
17.7 mm
|
55.7 mm
|
|
8
|
Q
|
18.1 mm
|
56.9 mm
|
|
8.5
|
Q1/2 |
18.5 mm
|
58.2 mm
|
|
9
|
R1/2 |
18.9 mm
|
59.5 mm
|
|
9.5
|
S1/2 |
19.4 mm
|
60.9 mm
|
|
10
|
T1/2 |
19.8 mm
|
62.2 mm
|
|
10.5
|
U1/2
|
20.2 mm
|
63.5 mm
|
|
11
|
V1/2
|
20.6 mm
|
64.8 mm
|
|
11.5
|
W1/2
|
21.0 mm
|
66.0 mm
|
|
12
|
Y
|
21.4 mm
|
67.3 mm
|
|
12.5
|
Z
|
21.8 mm
|
68.6 mm
|
|
13
|
Z+1
|
22.2 mm
|
69.9 mm
|
|
13.5
|
Z+1,5
|
22.6 mm
|
71.2 mm
|
|
14
|
Z+3 |
23.0 mm
|
72.4 mm
|