UK size |
diameter mm |
circumference mm |
USA size |
|
L |
16.10 |
51.2 |
5 1/2 |
|
L 1/2 |
16.41 |
51.8 |
5 7/8 |
|
M |
16.51 |
52.5 |
6 |
|
M 1/2 |
16.71 |
53.1 |
6 1/4 |
|
N |
16.92 |
53.8 |
6 1/5 |
|
N 1/2 |
17.13 |
54.4 |
6 3/4 |
|
O |
17.35 |
55.0 |
7 |
|
O 1/2 |
17.45 |
55.7 |
7 1/4 |
|
P |
17.75 |
56.3 |
7 1/2 |
|
P 1/2 |
17.97 |
56.9 |
7 3/4 |
|
Q |
18.19 |
57.6 |
8 |
|
Q 1/2 |
18.35 |
58.2 |
8 1/4 |
|
R |
18.61 |
58.9 |
8 5/8 |
|
R 1/2 |
18.80 |
59.5 |
8 7/8 |
|
S |
19.10 |
60.1 |
9 1/8 |
|
S 1/2 |
19.31 |
60.8 |
9 3/8 |
|
T |
19.51 |
61.4 |
9 5/8 |
|
T 1/2 |
19.84 |
62.1 |
10 |
|
U |
20.02 |
62.7 |
10 1/4 |
|
U 1/2 |
20.20 |
63.3 |
10 1/2 |
|
V |
20.32 |
64.0 |
10 5.8 |
|
V 1/2 |
20.68 |
64.6 |
11 |
|
W |
20.76 |
65.2 |
11 1/8 |
|
W 1/2 |
20.94 |
65.9 |
11 3/8 |
Please bear in mind that a ring should be a comfortable fit which can fit over the knuckle. It is usually recommended that wider sized rings are bought slightly larger than the original finger measurement