Ring Sizes & Measurement
How to measure your finger for a ring
Your ring should fit your finger comfortably; snug enough so that it will not fall off, but loose enough to slide over your knuckle.
Finger size changes depending on the time of day and the weather.
For best results measure your finger size:
-
At the end of the day and when your fingers are warm (Fingers are smaller in the early morning and when cold.)
-
Measure finger size 3 to 4 times to eliminate an erroneous reading.
Alternatively, you can use a piece of string or a slim band of paper to measure your finger. Simply wrap the string or paper around your finger at the base, mark the point at which overlap begins, then lay your string or paper flat and measure with a ruler marked in millimeters(mm). This will give you the proper circumference of the inside of the ring.
|
UK Size |
US Size |
Inner Diameter |
Inner Circumference |
|
|
|
in |
mm |
in |
mm |
|
A |
½ |
0.470 |
11.94 |
1.476 |
37.500 |
|
A½ |
¾ |
0.478 |
12.14 |
1.501 |
38.125 |
|
B |
1 |
0.487 |
12.33 |
1.526 |
38.750 |
|
B½ |
1¼ |
0.493 |
12.53 |
1.550 |
39.375 |
|
C |
1½ |
0.501 |
12.73 |
1.575 |
40.000 |
|
C½ |
1¾ |
0.509 |
12.93 |
1.599 |
40.625 |
|
D |
2 |
0.517 |
13.13 |
1.624 |
41.250 |
|
D½ |
2¼ |
0.525 |
13.33 |
1.649 |
41.875 |
|
E |
2½ |
0.533 |
13.53 |
1.673 |
42.500 |
|
E½ |
2¾ |
0.540 |
13.73 |
1.698 |
43.125 |
|
F |
3 |
0.548 |
13.93 |
1.722 |
43.750 |
|
F½ |
3⅛ |
0.556 |
14.13 |
1.747 |
44.375 |
|
G |
3⅜ |
0.564 |
14.32 |
1.772 |
45.000 |
|
G½ |
3⅝ |
0.572 |
14.52 |
1.796 |
45.625 |
|
H |
3¾ |
0.580 |
14.72 |
1.821 |
46.250 |
|
H½ |
4 |
0.587 |
14.92 |
1.845 |
46.875 |
|
I |
4¼ |
0.595 |
15.12 |
1.870 |
47.500 |
|
I½ |
4½ |
0.603 |
15.32 |
1.895 |
48.125 |
|
J |
4⅝ |
0.611 |
15.52 |
1.919 |
48.750 |
|
J½ |
5 |
0.619 |
15.72 |
1.944 |
49.375 |
|
K |
5⅛ |
0.627 |
15.92 |
1.969 |
50.000 |
|
K½ |
5⅜ |
0.634 |
16.11 |
1.993 |
50.625 |
|
L |
5½ |
0.642 |
16.31 |
2.018 |
51.250 |
|
L½ |
5⅞ |
0.650 |
16.51 |
2.042 |
51.875 |
|
M |
6 |
0.658 |
16.71 |
2.067 |
52.500 |
|
M½ |
6¼ |
0.669 |
16.91 |
2.092 |
53.125 |
|
N |
6½ |
0.674 |
17.11 |
2.116 |
53.750 |
|
N½ |
6¾ |
0.681 |
17.31 |
2.141 |
54.375 |
|
O |
7 |
0.689 |
17.51 |
2.165 |
55.000 |
|
O½ |
7¼ |
0.697 |
17.71 |
2.190 |
55.625 |
|
P |
7½ |
0.705 |
17.90 |
2.215 |
56.250 |
|
P½ |
7¾ |
0.713 |
18.10 |
2.239 |
56.875 |
|
Q |
8 |
0.721 |
18.30 |
2.264 |
57.500 |
|
Q½ |
8¼ |
0.728 |
18.50 |
2.288 |
58.125 |
|
R |
8⅝ |
0.736 |
18.70 |
2.313 |
58.750 |
|
R½ |
8⅞ |
0.744 |
18.90 |
2.338 |
59.375 |
|
S |
9⅛ |
0.752 |
19.10 |
2.362 |
60.000 |
|
S½ |
9⅜ |
0.760 |
19.30 |
2.387 |
60.625 |
|
T |
9⅝ |
0.768 |
19.50 |
2.411 |
61.250 |
|
T½ |
10 |
0.775 |
19.70 |
2.436 |
61.875 |
|
U |
10¼ |
0.783 |
19.89 |
2.461 |
62.500 |
|
U½ |
10½ |
0.791 |
20.09 |
2.485 |
63.125 |
|
V |
10⅝ |
0.799 |
20.29 |
2.510 |
63.750 |
|
V½ |
11 |
0.807 |
20.49 |
2.534 |
64.375 |
|
W |
11⅛ |
0.815 |
20.69 |
2.559 |
65.000 |
|
W½ |
11⅜ |
0.822 |
20.89 |
2.584 |
65.625 |
|
X |
11⅝ |
0.830 |
21.09 |
2.608 |
66.250 |
|
X½ |
11⅞ |
0.838 |
21.29 |
2.633 |
66.875 |
|
Y |
12 |
0.846 |
21.49 |
2.657 |
67.500 |
|
Y½ |
-- |
0.854 |
21.68 |
2.682 |
68.125 |
|
Z |
12½ |
0.862 |
21.88 |
2.707 |
68.750 |
|
Z½ |
12¾ |
0.869 |
22.08 |
2.731 |
69.375 |
|
Z+1 |
-- |
0.877 |
22.28 |
2.756 |
70.000 |
|
Z+2 |
-- |
0.893 |
22.68 |
2.805 |
71.250 |
|
Z+3 |
-- |
0.909 |
23.08 |
2.854 |
72.500 |
|
Z+4 |
-- |
0.924 |
23.47 |
2.904 |
73.750 |
|
Z+5 |
-- |
0.940 |
23.87 |
2.953 |
75.000 |
|
Z+6 |
-- |
0.956 |
24.27 |
3.002 |
76.250 |
|
Z+7 |
-- |
0.971 |
24.67 |
3.051 |
77.500 |
|
Z+8 |
-- |
0.987 |
25.07 |
3.100 |
78.750 |
Click here to see our Rings Department