In this case, you’re going to have to do a little detective work to find out your partner’s ring size. Here are a few helpful tips to find your Ring Size:
If you have to guess, remember that it is easier to resize a ring down than up, so pick a larger size than you think she really is.
Choose how you’d like to determine your ring size:
British | Irish Australian Size |
US | Canada Size |
Inside Diameter (inches) |
Inside Diameter (mm) |
Inside Circumference (inches) |
Inside Circumference (mm) |
---|---|---|---|---|---|
F 1/2 |
3 |
0.554 |
14.1 |
1.74 |
44.2 |
G |
3.25 |
0.562 |
14.3 |
1.765 |
44.8 |
G 1/2 |
3.5 |
0.57 |
14.5 |
1.79 |
45.5 |
H |
3.75 |
0.578 |
14.7 |
1.815 |
46.1 |
H 1/2 |
4 |
0.586 |
14.9 |
1.84 |
46.7 |
I |
4.25 |
0.594 |
15.1 |
1.865 |
47.4 |
I 1/2 |
4.5 |
0.602 |
15.3 |
1.89 |
48 |
J |
4.75 |
0.61 |
15.5 |
1.915 |
48.7 |
J 1/2 |
5 |
0.618 |
15.7 |
1.941 |
49.3 |
K |
5.25 |
0.626 |
15.9 |
1.966 |
49.9 |
K 1/2 |
5.5 |
0.634 |
16.1 |
1.991 |
50.6 |
L |
5.75 |
0.642 |
16.3 |
2.016 |
51.2 |
L 1/2 |
6 |
0.65 |
16.5 |
2.041 |
51.8 |
M |
6.25 |
0.658 |
16.7 |
2.066 |
52.5 |
M 1/2 |
6.5 |
0.666 |
16.9 |
2.091 |
53.1 |
N |
6.75 |
0.674 |
17.1 |
2.116 |
53.8 |
N 1/2 |
7 |
0.682 |
17.3 |
2.141 |
54.4 |
O |
7.25 |
0.69 |
17.5 |
2.167 |
55 |
O 1/2 |
7.5 |
0.698 |
17.7 |
2.192 |
55.7 |
P |
7.75 |
0.706 |
17.9 |
2.217 |
56.3 |
P 1/2 |
8 |
0.714 |
18.1 |
2.242 |
56.9 |
Q |
8.25 |
0.722 |
18.3 |
2.267 |
57.6 |
Q 1/2 |
8.5 |
0.73 |
18.5 |
2.292 |
58.2 |
R |
8.75 |
0.738 |
18.7 |
2.317 |
58.9 |
R 1/2 |
9 |
0.746 |
18.9 |
2.342 |
59.5 |
S |
9.25 |
0.754 |
19.2 |
2.368 |
60.1 |
S 1/2 |
9.5 |
0.762 |
19.4 |
2.393 |
60.8 |
T |
9.75 |
0.77 |
19.6 |
2.418 |
61.4 |
T 1/2 |
10 |
0.781 |
19.8 |
2.443 |
62.1 |
U |
10.25 |
0.788 |
20 |
2.468 |
62.7 |
U 1/2 |
10.5 |
0.794 |
20.2 |
2.493 |
63.3 |
V |
10.75 |
0.802 |
20.4 |
2.518 |
64 |
V 1/2 |
11 |
0.81 |
20.6 |
2.543 |
64.6 |
W |
11.25 |
0.818 |
20.8 |
2.569 |
65.2 |
W 1/2 |
11.5 |
0.826 |
21 |
2.594 |
65.9 |
X |
11.75 |
0.834 |
21.2 |
2.619 |
66.5 |
X 1/2 |
12 |
0.842 |
21.4 |
2.644 |
67.2 |
Y |
12.25 |
0.85 |
21.6 |
2.669 |
67.8 |
Y 1/2 |
12.5 |
0.858 |
21.8 |
2.694 |
68.4 |
Z |
12.75 |
0.866 |
22 |
2.719 |
69.1 |
Z+1 |
13.25 |
0.882 |
22.4 |
2.769 |
70.3 |
To form a ring shape, push the end of the ring sizer through the buckle as you’d do with a belt.
Wear the ring sizer on your finger and adjust to a comfortable fit while making sure it can still slip back over your knuckle.
When you’ve found your best fit, the letter that is pointed at by the arrow is your ring size.
Let’s get you a Ramzi & Co. free ring sizer.
Provide your details below and we’ll pop one in the mail right away.