A ring should fit comfortably on the finger of the wearer as well as be snug enough to prevent it from accidentally falling off. The best and most accurate way to measure a ring size is by visiting a local jeweler. Jewelers use a set of graduated rings and other specialized tools to determine ring size. Ring size can also be measured easily at home by any of the following ways:
Ring Size Measurement by Ring’s Diameter
The diameter of a ring can be determined by measuring the distance across the middle inside. You can use the ring size circles below (based on ring’s diameter) for measuring your exact ring size. Please follow the steps listed below to get an accurate ring size:
Ring Size Measurement by Ring’s Circumference
The circumference of a ring is measured by the length around the inner circle. You can use the finger size strip below for measuring your exact ring size. Please follow the steps to get the accurate ring size:
Print Instructions
To get accurate ring size results, please follow these print instructions:
Tips for Measuring Accurate Ring Size
Tips if you’re buying the Ring as a Surprise
Other Tips and Information
International Conversion Chart for Ring Sizes
The following chart will be useful in conversion of measured ring size in inches or in millimeters to numbered size applicable in USA and Canada. This chart also shows ring sizes applicable in UK, Ireland, Australia, Japan and Switzerland.
Ring Sizes | Measured Sized | ||||||
USA & Canada | UK, Ireland & Australia | Japan | Switzerland | Inside Diameter | Inside Circumference | ||
Inches | Millimeters | Inches | Millimeters | ||||
0 |
|
|
|
0.458 |
11.63 |
1.44 |
36.5 |
1/4 |
|
|
|
0.466 |
11.84 |
1.46 |
37.2 |
1/2 |
A |
|
|
0.474 |
12.04 |
1.49 |
37.8 |
3/4 |
A 1/2 |
|
|
0.482 |
12.24 |
1.51 |
38.5 |
1 |
B |
1 |
|
0.49 |
12.45 |
1.54 |
39.1 |
1 1/4 |
B 1/2 |
|
|
0.498 |
12.65 |
1.56 |
39.7 |
1 1/2 |
C |
|
|
0.506 |
12.85 |
1.59 |
40.4 |
1 3/4 |
C 1/2 |
|
|
0.514 |
13.06 |
1.61 |
41.0 |
2 |
D |
2 |
1.5 |
0.522 |
13.26 |
1.64 |
41.7 |
2 1/4 |
D 1/2 |
|
|
0.53 |
13.46 |
1.67 |
42.3 |
2 1/2 |
E |
3 |
2.75 |
0.538 |
13.67 |
1.69 |
42.9 |
2 3/4 |
E 1/2 |
|
|
0.546 |
13.87 |
1.72 |
43.6 |
3 |
F |
4 |
4 |
0.554 |
14.07 |
1.74 |
44.2 |
3 1/4 |
F 1/2 |
5 |
5.25 |
0.562 |
14.27 |
1.77 |
44.8 |
3 1/2 |
G |
|
|
0.57 |
14.48 |
1.79 |
45.5 |
3 3/4 |
G 1/2 |
6 |
6.5 |
0.578 |
14.68 |
1.82 |
46.1 |
4 |
H |
7 |
|
0.586 |
14.88 |
1.84 |
46.8 |
4 1/4 |
H 1/2 |
|
7.75 |
0.594 |
15.09 |
1.87 |
47.4 |
4 1/2 |
I |
8 |
|
0.602 |
15.29 |
1.89 |
48.0 |
4 3/4 |
J |
|
9 |
0.61 |
15.49 |
1.92 |
48.7 |
5 |
J 1/2 |
9 |
|
0.618 |
15.70 |
1.94 |
49.3 |
5 1/4 |
K |
|
10 |
0.626 |
15.90 |
1.97 |
50.0 |
5 1/2 |
K 1/2 |
10 |
|
0.634 |
16.10 |
1.99 |
50.6 |
5 3/4 |
L |
|
11.75 |
0.642 |
16.31 |
2.02 |
51.2 |
6 |
L 1/2 |
11 |
12.75 |
0.65 |
16.51 |
2.04 |
51.9 |
6 1/4 |
M |
12 |
|
0.658 |
16.71 |
2.07 |
52.5 |
6 1/2 |
M 1/2 |
13 |
14 |
0.666 |
16.92 |
2.09 |
53.1 |
6 3/4 |
N |
|
|
0.674 |
17.12 |
2.12 |
53.8 |
7 |
N 1/2 |
14 |
15.25 |
0.682 |
17.32 |
2.14 |
54.4 |
7 1/4 |
O |
|
|
0.69 |
17.53 |
2.17 |
55.1 |
7 1/2 |
O 1/2 |
15 |
16.5 |
0.698 |
17.73 |
2.19 |
55.7 |
7 3/4 |
P |
|
|
0.706 |
17.93 |
2.22 |
56.3 |
8 |
P 1/2 |
16 |
17.75 |
0.714 |
18.14 |
2.24 |
57.0 |
8 1/4 |
Q |
|
|
0.722 |
18.34 |
2.27 |
57.6 |
8 1/2 |
Q 1/2 |
17 |
|
0.73 |
18.54 |
2.29 |
58.3 |
8 3/4 |
R |
|
19 |
0.738 |
18.75 |
2.32 |
58.9 |
9 |
R 1/2 |
18 |
|
0.746 |
18.95 |
2.34 |
59.5 |
9 1/4 |
S |
|
20.25 |
0.754 |
19.15 |
2.37 |
60.2 |
9 1/2 |
S 1/2 |
19 |
|
0.762 |
19.35 |
2.39 |
60.8 |
9 3/4 |
T |
|
21.5 |
0.77 |
19.56 |
2.42 |
61.4 |
10 |
T 1/2 |
20 |
|
0.778 |
19.76 |
2.44 |
62.1 |
10 1/4 |
U |
21 |
|
0.786 |
19.96 |
2.47 |
62.7 |
10 1/2 |
U 1/2 |
22 |
22.75 |
0.794 |
20.17 |
2.49 |
63.4 |
10 3/4 |
V |
|
|
0.802 |
20.37 |
2.52 |
64.0 |
11 |
V 1/2 |
23 |
|
0.81 |
20.57 |
2.54 |
64.6 |
11 1/4 |
W |
|
25 |
0.818 |
20.78 |
2.57 |
65.3 |
11 1/2 |
W 1/2 |
24 |
|
0.826 |
20.98 |
2.59 |
65.9 |
11 3/4 |
X |
|
|
0.834 |
21.18 |
2.62 |
66.6 |
12 |
X 1/2 |
25 |
27.5 |
0.842 |
21.39 |
2.65 |
67.2 |
12 1/4 |
Y |
|
|
0.85 |
21.59 |
2.67 |
67.8 |
12 1/2 |
Z |
26 |
28.75 |
0.858 |
21.79 |
2.70 |
68.5 |
12 3/4 |
Z 1/2 |
|
|
0.866 |
22.00 |
2.72 |
69.1 |
13 |
|
27 |
|
0.874 |
22.20 |
2.75 |
69.7 |
13 1/4 |
Z1 |
|
|
0.882 |
22.40 |
2.77 |
70.4 |
13 1/2 |
|
|
|
0.89 |
22.61 |
2.80 |
71.0 |
13 3/4 |
Z2 |
|
|
0.898 |
22.81 |
2.82 |
71.7 |
14 |
Z3 |
|
|
0.906 |
23.01 |
2.85 |
72.3 |
14 1/4 |
|
|
|
0.914 |
23.22 |
2.87 |
72.9 |
14 1/2 |
Z4 |
|
|
0.922 |
23.42 |
2.90 |
73.6 |
14 3/4 |
|
|
|
0.93 |
23.62 |
2.92 |
74.2 |
15 |
|
|
|
0.938 |
23.83 |
2.95 |
74.8 |
15 1/4 |
|
|
|
0.946 |
24.03 |
2.97 |
75.5 |
15 1/2 |
|
|
|
0.954 |
24.23 |
3.00 |
76.1 |
15 3/4 |
|
|
|
0.962 |
24.43 |
3.02 |
76.8 |
16 |
|
|
|
0.97 |
24.64 |
3.05 |
77.4 |
Facts about International Ring Sizing
Resizing your Ring
Most gold or silver rings can be resized by a skilled jeweler by way of soldering or stretching and compressing. However, some rings cannot be resized due to gemstone setting, plating, shape or surface design. Usually small resizing does not create problems, but more extreme resizing can noticeably impact the look and structure of your ring. Increasing the size of a ring typically requires gentle hammering and this will cause the shank of the ring to thin slightly. For decreasing or increasing the ring size, your jeweler may also remove or insert extra metal through soldering. Some jewelers do not resize platinum because of its density and strength.