Ring Size Guide
Finding the perfect ring size ensures both comfort and elegance.
Use the chart below to convert between international ring sizes and measurements in millimeters.
If you’re unsure, we recommend measuring an existing ring that fits comfortably on the intended finger.
How to Measure Your Ring Size
1. Measure the Inside Diameter – Use a ruler or caliper to measure the distance across the inside of a ring that fits you.
2. Find the Inside Circumference – Multiply the diameter (mm) × 3.14, or use our chart below.
3. Match with Your Country’s Size – Use the table to find your equivalent ring size in the U.S., U.K., France, or Japan.
International Ring Size Conversion Chart
|
Inside Circumference (mm) |
US / Canada |
UK / Australia / South Africa |
France / Germany |
Japan |
|
|
14.1 |
44.2 |
3 |
F |
44 |
4 |
|
14.5 |
45.5 |
3.5 |
G |
46 |
5 |
|
14.9 |
46.8 |
4 |
H |
47 |
7 |
|
15.3 |
48.0 |
4.5 |
I |
48 |
8 |
|
15.7 |
49.3 |
5 |
J½ |
50 |
9 |
|
16.1 |
50.6 |
5.5 |
K½ |
51 |
10 |
|
16.5 |
51.9 |
6 |
L½ |
52 |
11 |
|
16.9 |
53.1 |
6.5 |
M½ |
53 |
13 |
|
17.3 |
54.4 |
7 |
N½ |
54 |
14 |
|
17.7 |
55.7 |
7.5 |
O½ |
56 |
15 |
|
18.1 |
57.0 |
8 |
P½ |
57 |
16 |
|
18.5 |
58.3 |
8.5 |
Q½ |
58 |
17 |
|
19.0 |
59.5 |
9 |
R½ |
59 |
18 |
|
19.4 |
60.8 |
9.5 |
S½ |
61 |
20 |
|
19.8 |
62.1 |
10 |
T½ |
62 |
21 |
|
20.2 |
63.4 |
10.5 |
U½ |
63 |
22 |
|
20.6 |
64.6 |
11 |
V½ |
64 |
23 |
|
21.0 |
65.9 |
11.5 |
W½ |
66 |
25 |
|
21.4 |
67.2 |
12 |
X½ |
67 |
26 |
|
21.8 |
68.5 |
12.5 |
Z |
68 |
28 |
|
22.2 |
69.7 |
13 |
Z+1 |
70 |
29 |
|
22.6 |
71.0 |
13.5 |
Z+1.5 |
71 |
30 |
|
23.0 |
72.3 |
14 |
Z+3 |
72 |
31 |
|
23.4 |
73.5 |
14.5 |
Z+4 |
73 |
32 |
|
23.8 |
74.8 |
15 |
Z+5 |
74 |
33 |
Helpful Tips
Measure your finger at the end of the day when it’s warm for the most accurate result.
Avoid measuring after cold weather or exercise.
If between two sizes, choose the larger one for comfort.
Need resizing? We offer one free ring size change within 30 days of delivery.
Still Unsure About Your Size?
Contact our support team — we’re happy to help you find your perfect fit.