All Nodeform rings are specified in standard US sizes. View the conversion chart to see how US sizes map to finger diameter, as well as how US sizes convert to Canada, Australia, UK and other countries.
View the International Ring Size Chart
|
Inside Diameter
in mm
|
US, Canada, Mexico
|
UK, Australia, Ireland, New Zealand, South Africa
|
France
|
Germany, Russia, Ukraine, Asia
|
India, China, Japan, South America, Turkey, Israel
|
Italy, Spain, Netherlands, Switzerland
|
|
|
|
14.07
|
3
|
F
|
44
|
14
|
4
|
4
|
|
14.27
|
3.25
|
F 3/4
|
44.625
|
14.25
|
---
|
4.625
|
|
14.48
|
3.5
|
G 1/4
|
45.25
|
14.5
|
5
|
5.25
|
|
14.68
|
3.75
|
H
|
45.875
|
14.75
|
6
|
5.875
|
|
14.88
|
4
|
H 1/2
|
46.5
|
15
|
7
|
6.5
|
|
15.09
|
4.25
|
I
|
47.125
|
15.25
|
---
|
7.125
|
|
15.29
|
4.5
|
I 1/2
|
47.75
|
15.5
|
8
|
7.75
|
|
15.49
|
4.75
|
J 1/4
|
48.375
|
---
|
---
|
8.375
|
|
15.70
|
5
|
J 1/2
|
49
|
15.75
|
9
|
9
|
|
15.90
|
5.25
|
K 1/4
|
49.625
|
16
|
---
|
9.625
|
|
16.10
|
5.5
|
L
|
50.25
|
16.25
|
10
|
10.25
|
|
16.31
|
5.75
|
L 1/4
|
50.875
|
---
|
11
|
10.875
|
|
16.51
|
6
|
M
|
51.5
|
16.5
|
12
|
11.5
|
|
16.71
|
6.25
|
M 1/2
|
52.125
|
16.75
|
---
|
12.125
|
|
16.92
|
6.5
|
N
|
52.75
|
17
|
13
|
12.75
|
|
17.12
|
6.75
|
N 1/2
|
53.375
|
---
|
---
|
13.375
|
|
17.32
|
7
|
O
|
54
|
17.25
|
14
|
14
|
|
17.53
|
7.25
|
O 1/2
|
54.625
|
17.5
|
---
|
14.625
|
|
17.75
|
7.5
|
P
|
55.25
|
17.75
|
15
|
15.25
|
|
17.93
|
7.75
|
P 1/2
|
55.875
|
---
|
---
|
15.875
|
|
18.14
|
8
|
Q
|
56.5
|
18
|
16
|
16.5
|
|
18.34
|
8.25
|
Q 1/2
|
57.125
|
18.25
|
---
|
7.125
|
|
18.54
|
8.5
|
Q 3/4
|
57.75
|
18.5
|
17
|
17.75
|
|
18.75
|
8.75
|
R 1/4
|
58.375
|
18.75
|
---
|
18.375
|
|
18.95
|
9
|
R 3/4
|
59
|
19
|
18
|
19
|
|
19.15
|
9.25
|
S 1/4
|
59.625
|
19.25
|
---
|
19.625
|
|
19.35
|
9.5
|
S 3/4
|
60.25
|
19.5
|
19
|
20.25
|
|
19.56
|
9.75
|
T 1/4
|
60.875
|
19.75
|
---
|
20.875
|
|
19.76
|
10
|
T 1/2
|
61.5
|
20
|
20
|
21.25
|
|
19.96
|
10.25
|
U
|
62.125
|
20.25
|
21
|
22.125
|
|
20.17
|
10.5
|
U 1/2
|
62.75
|
20.5
|
22
|
22.75
|
|
20.37
|
10.75
|
V 1/4
|
63.375
|
---
|
---
|
23.375
|
|
20.57
|
11
|
V 1/2
|
64
|
20.75
|
23
|
24
|
|
20.78
|
11.25
|
W 1/4
|
64.625
|
---
|
---
|
24.625
|
|
20.98
|
11.5
|
W 3/4
|
65.25
|
21
|
24
|
25.25
|
|
21.18
|
11.75
|
X 1/4
|
65.875
|
---
|
---
|
25.875
|
|
21.39
|
12
|
Y
|
66.5
|
21.25
|
25
|
26.5
|
|
21.59
|
12.25
|
Y 1/2
|
67.125
|
21.5
|
---
|
27.125
|
|
21.79
|
12.5
|
Z
|
67.75
|
21.75
|
26
|
27.75
|
|
22.0
|
12.75
|
Z + 1/2
|
68.375
|
---
|
---
|
28.375
|
|
22.20
|
13
|
Z + 1
|
69
|
22
|
27
|
29
|
Helpful sizing tips
- Fingers on a dominant hand are generally slightly larger than on non-dominant hands— make sure you measure the right finger on the correct hand!
- Rings with wider bands will fit a bit tighter. Consider selecting one 1/4 to 1/2 size up from your normal ring size.If you plan to measure one of your partner's rings, try to measure one with a similar width as the ring you want to purchase.
- For stacking rings: for a more comfortable fit, consider selecting one 1/4 to 1/2 size up from your normal ring size.
- Make sure the finger is at normal body temperature — fingers can shrink or expand when hot or cold.
- Your fingers tend to change size throughout the day — the best time to measure your finger is the end of the day.
- If your knuckle is bigger, take 2 measurements and choose a size in between — ring needs to fit over knuckle but not be too loose or it will shift around.
