Rings
To measure the ring size using a ring that fits, you need measure the internal diameter of the ring. Write down this measurement in millimeters, and use the conversion chart below to find your ring size. If you don't have a ring to use, follow these easy steps:
| Inside Circum. (IN) |
Inside Circum. (MM) |
US/CA |
UK/IE/AU |
DE |
| 1.84 |
46.8 |
4 |
H |
15 |
| 1.87 |
47.4 |
4.25 |
H-1/2 |
15.25 |
| 1.89 |
48 |
4.5 |
I |
15.5 |
| 1.92 |
48.7 |
4.75 |
J |
--- |
| 1.94 |
49.3 |
5 |
J-1/2 |
15.75 |
| 1.97 |
50 |
5.25 |
K |
16 |
| 1.99 |
50.6 |
5.5 |
K-1/2 |
16.25 |
| 2.02 |
51.2 |
5.75 |
L |
--- |
| 2.04 |
51.9 |
6 |
L-1/2 |
16.5 |
| 2.07 |
52.5 |
6.25 |
M |
16.75 |
| 2.09 |
53.1 |
6.5 |
M-1/2 |
17 |
| 2.12 |
53.8 |
6.75 |
N |
--- |
| 2.14 |
54.4 |
7 |
N-1/2 |
17.25 |
| 2.17 |
55 |
7.25 |
O |
17.5 |
| 2.19 |
55.7 |
7.5 |
O-1/2 |
17.75 |
| 2.22 |
56.3 |
7.75 |
P |
--- |
| 2.24 |
57 |
8 |
P-1/2 |
18 |
| 2.27 |
57.6 |
8.25 |
Q |
18.25 |
| 2.29 |
58.2 |
8.5 |
Q-1/2 |
18.5 |
| 2.32 |
58.9 |
8.75 |
R |
18.75 |
| 2.34 |
59.5 |
9 |
R-1/2 |
19 |
| 2.37 |
60.1 |
9.25 |
S |
19.25 |
| 2.39 |
60.8 |
9.5 |
S-1/2 |
19.5 |
| 2.42 |
61.4 |
9.75 |
T |
19.75 |
| 2.44 |
62.1 |
10 |
T-1/2 |
20 |
| 2.47 |
62.7 |
10.25 |
U |
20.25 |
| 2.49 |
63.3 |
10.5 |
U-1/2 |
20.5 |
| 2.52 |
64 |
10.75 |
V |
--- |
| 2.54 |
64.6 |
11 |
V-1/2 |
20.75 |
| 2.57 |
65.2 |
11.25 |
W |
--- |
| 2.59 |
65.9 |
11.5 |
W-1/2 |
21 |
| 2.62 |
66.5 |
11.75 |
X |
--- |
| 2.65 |
67.2 |
12 |
X-1/2 |
21.25 |
| 2.67 |
67.8 |
12.25 |
Y-1/2 |
21.5 |
| 2.7 |
68.4 |
|
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