Ring Sizes
How to measure your ring size
Please note:
Rings with a particularly thick band will feel tighter than a thin band. In these cases, we recommend choosing a full size larger than your normal ring size.
Tips
Your ring should fit your finger comfortably– snug enough so it won’t fall off, but loose enough to slide over your knuckle. As your finger size can change throughout the day, it’s best to measure at the end of the day when your fingers are at their largest. Measuring when your hands are cold can sometimes mean your fingers will be at least half a size smaller.
*KWJewels uses the French/Japanese method of ring sizing but can convert any measurement given to correctly size your choice of ring.
Millimetres |
French/Japanese |
Australian/English |
American |
37.8252 |
- |
A |
½ |
38.4237 |
- |
A 1/2 |
¾ |
39.0222 |
- |
B |
1 |
39.6207 |
- |
B 1/2 |
1 ¼ |
40.2192 |
- |
C |
1 ½ |
40.8177 |
- |
C 1/2 |
1 ¾ |
41.4162 |
1 |
D |
2 |
42.0147 |
2 |
D 1/2 |
2 ¼ |
42.6132 |
- |
E |
2 ½ |
43.2117 |
3 |
E 1/2 |
2 ¾ |
43.8102 |
4 |
F |
3 |
44.4087 |
- |
F 1/2 |
3 ¼ |
45.0072 |
5 |
G |
3 ¼ |
45.6057 |
- |
G 1/2 |
3 ½ |
46.2042 |
6 |
H |
3 ¾ |
46.8027 |
- |
H 1/2 |
4 |
47.4012 |
7 |
I |
4 ¼ |
47.9997 |
8 |
I 1/2 |
4 ½ |
48.5982 |
- |
J |
4 ¾ |
49.1967 |
9 |
J 1/2 |
5 |
49.7952 |
10 |
K |
5 ¼ |
50.3937 |
- |
K 1/2 |
5 ½ |
50.9922 |
11 |
L |
5 ¾ |
51.5907 |
- |
L 1/2 |
6 |
52.1892 |
12 |
M |
6 ¼ |
52.7877 |
13 |
M 1/2 |
6 ½ |
53.4660 |
- |
N |
6 ¾ |
54.1044 |
14 |
N 1/2 |
7 |
54.7428 |
15 |
O |
7 |
55.3812 |
- |
O 1/2 |
7 ¼ |
56.0196 |
16 |
P |
7 ½ |
56.6580 |
- |
P 1/2 |
7 ¾ |
57.2964 |
17 |
Q |
8 |
57.9348 |
18 |
Q 1/2 |
8 ¼ |
58.5732 |
- |
R |
8 ½ |
59.2116 |
19 |
R 1/2 |
8 ¾ |
59.8500 |
20 |
S |
9 |
60.4884 |
- |
S 1/2 |
9 ¼ |
61.1268 |
21 |
T |
9 ½ |
61.7652 |
22 |
T 1/2 |
9 ¾ |
62.4026 |
- |
U |
10 |
63.0420 |
23 |
U 1/2 |
10 ¼ |
63.6804 |
24 |
V |
10 ½ |
64.3188 |
- |
V 1/2 |
10 ¾ |
64.8774 |
25 |
W |
11 |
65.4759 |
- |
W 1/2 |
11 ¼ |
66.0744 |
26 |
X |
11 ½ |
66.6729 |
- |
X 1/2 |
11 ¾ |
67.2714 |
- |
Y |
12 |
67.8699 |
- |
Y 1/2 |
12 ¼ |
68.4684 |
- |
Z |
12 ½ |