On Display Ring Sizer App

You can use the following app to find your ring size in 2 easy steps. This app is not compatible with mobile screens and should be used on laptop or desktop computers only. The instructions are provided for each step, please read the app's FAQ & Tips to maximize your accuracy. It is highly recommended to measure the size at least 3 times to make sure you are getting a consistent reading.


International Ring Size Chart

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Ring Diameter size
 Diameter
 (mm)
Ring Circumference size
Circumference (mm)
US and Canada Ring Size
US & Canada
UK and Australia Ring Size
UK & Australia
EU Ring Size
 Europe
Japan & SingaporeRing Size
Singapore & Japan
Diameter (mm)
14.2
Circumference (mm)
44.2
US & Canada
3
UK & Australia
F 1/2
Europe
44
Singapore & Japan
4
Diameter (mm)
14.3
Circumference (mm)
44.8
US & Canada
-
UK & Australia
G
Europe
45
Singapore & Japan
5
Diameter (mm)
14.5
Circumference (mm)
45.5
US & Canada
3 1/2
UK & Australia
G 1/2
Europe
-
Singapore & Japan
-
Diameter (mm)
14.7
Circumference (mm)
46.1
US & Canada
-
UK & Australia
H
Europe
46
Singapore & Japan
6
Diameter (mm)
14.9
Circumference (mm)
46.8
US & Canada
4
UK & Australia
H 1/2
Europe
47
Singapore & Japan
7
Diameter (mm)
15.1
Circumference (mm)
47.4
US & Canada
-
UK & Australia
I
Europe
-
Singapore & Japan
-
Diameter (mm)
15.3
Circumference (mm)
48.0
US & Canada
4 1/2
UK & Australia
I 1/2
Europe
48
Singapore & Japan
8
Diameter (mm)
15.5
Circumference (mm)
48.7
US & Canada
-
UK & Australia
J
Europe
-
Singapore & Japan
-
Diameter (mm)
15.7
Circumference (mm)
49.3
US & Canada
5
UK & Australia
J 1/2
Europe
49
Singapore & Japan
9
Diameter (mm)
15.9
Circumference (mm)
50.0
US & Canada
-
UK & Australia
K
Europe
50
Singapore & Japan
-
Diameter (mm)
16.1
Circumference (mm)
50.6
US & Canada
5 1/2
UK & Australia
K 1/2
Europe
-
Singapore & Japan
10
Diameter (mm)
16.3
Circumference (mm)
51.2
US & Canada
-
UK & Australia
L
Europe
51
Singapore & Japan
-
Diameter (mm)
16.5
Circumference (mm)
51.9
US & Canada
6
UK & Australia
L 1/2
Europe
52
Singapore & Japan
11
Diameter (mm)
16.7
Circumference (mm)
52.5
US & Canada
-
UK & Australia
M
Europe
-
Singapore & Japan
12
Diameter (mm)
16.9
Circumference (mm)
53.1
US & Canada
6 1/2
UK & Australia
M 1/2
Europe
53
Singapore & Japan
13
Diameter (mm)
17.1
Circumference (mm)
53.8
US & Canada
-
UK & Australia
N
Europe
-
Singapore & Japan
-
Diameter (mm)
17.3
Circumference (mm)
54.4
US & Canada
7
UK & Australia
N 1/2
Europe
54
Singapore & Japan
14
Diameter (mm)
17.5
Circumference (mm)
55.1
US & Canada
-
UK & Australia
O
Europe
55
Singapore & Japan
-
Diameter (mm)
17.7
Circumference (mm)
55.7
US & Canada
7 1/2
UK & Australia
O 1/2
Europe
-
Singapore & Japan
15