But I don't know my ring size! How can I find out my ring size from home? This is a commonly asked question. Although we would recommend visiting a jeweller to accurately find out your ring size, you can easily find out from home. So here are three easy ways that you can measure your own ring size, and compare your findings with the chart below.
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Option 1. Measure your size: |
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Get yourself a piece of string several centimetresĀ long. You can also use a more common household item, floss! Wrap the string around your finger.Ā Mark with a pen where the strip joins. Measure in millimetresĀ the length between the two pen marks using a ruler. Do not tighten the strip too hard when you wrap around your finger. The strip should slide easily.
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Option 2. Buy your own ring sizer. |

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Option 3. Measure the size of one of your own rings. |
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Ā Measure the inner diameter of one of your rings with a ruler, note the size preferably in millimetres.
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Ring Size Conversion Chart
Inside Diameter (Measure a ring)
|
Inside Circumference (Measure your finger)
|
|
|
MM |
Inches |
MM |
Inches |
UK & Australian sizes |
US and Canadian sizes |
13.21 |
0.52" |
41.50 mm |
1.63" |
D |
Size 2 |
14.05 |
0.553" |
44.14 mm |
1.74" |
F |
Size 3 |
14.45 |
0.569" |
45.40 mm
|
1.79" |
G 1/4 |
Size 3.5 |
14.86 |
0.585" |
46.68 mm
|
1.84" |
H 1/2 |
Size 4 |
15.27 |
0.601" |
47.97 mm
|
1.89" |
I 1/2 |
Size 4.5 |
15.70 |
0.618" |
49.32 mm
|
1.94" |
J 1/2 |
Size 5 |
15.90 |
0.626" |
49.95 mm |
1.97" |
K 1/4 |
Size 5.25 |
16.10 |
0.634" |
50.58 mm
|
1.99" |
L |
Size 5.5 |
16.51 |
0.650" |
51.87 mm
|
2.04" |
M |
Size 6 |
16.92 |
0.666" |
53.16 mm
|
2.09" |
N |
Size 6.5 |
17.35 |
0.683" |
54.51 mm
|
2.15" |
O |
Size 7 |
17.75 |
0.699" |
55.76 mm
|
2.20" |
P |
Size 7.5 |
18.19 |
0.716" |
57.15 mm
|
2.25" |
Q |
Size 8 |
18.53 |
0.729" |
58.21 mm
|
2.29" |
Q 3/4 |
Size 8.5 |
18.89 |
0.748" |
59.34 mm
|
2.35" |
R 3/4 |
Size 9 |
19.41 |
0.764" |
60.98 mm
|
2.40" |
S 3/4 |
Size 9.5 |
19.84 |
0.781" |
62.33 mm
|
2.45" |
T 1/2 |
Size 10 |
20.20 |
0.797" |
63.46 mm
|
2.50" |
U 1/2 |
Size 10.5 |
20.68 |
0.814" |
64.97 mm
|
2.56" |
V 1/2 |
Size 11 |
21.08 |
0.830" |
66.22 mm
|
2.61" |
W 3/4 |
Size 11.5 |
21.49 |
0.846" |
67.51 mm
|
2.66" |
Y |
Size 12 |
21.89 |
0.862" |
68.77 mm
|
2.71" |
Z |
Size 12.5 |
22.33 |
0.879" |
70.15 mm
|
2.76" |
|
Size 13 |
22.60 |
0.890" |
71.00 mm
|
2.80" |
|
Size 13.5 |
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