Ring Size Guide
To find your ring size you can either:
-
Measure an existing ring – pick a ring that fits, measure its inside diameter in mm, then match it to the chart.
-
Measure your finger – wrap a strip of paper around the finger, mark where the ends meet, measure that length in mm, then use the chart.
Useful Tips:
- If you’re between two sizes, choose the larger one so the ring feels comfortable.
- Cold weather can make your fingers about half a size smaller, while heat can make them swell.
- For the most reliable measurement, check your ring size later in the day.
-
Wide bands fit more snugly than narrow ones, so consider going up a size.
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Ring Size Conversion Table
Diameter (mm) |
Circumference (mm) |
International* |
Italian |
US |
UK |
14.5 |
45.0 |
45 |
6 |
3.75 |
G |
14.8 |
46.5 |
46.5 |
7 |
4.25 |
H |
15.2 |
47.8 |
47.5 |
8 |
4.5 |
I |
15.6 |
49.0 |
48.5 |
9 |
5 |
J |
16.0 |
50.3 |
50 |
10 |
5.5 |
K |
16.4 |
51.5 |
51 |
11 |
6 |
L |
16.8 |
52.8 |
52.5 |
12 |
6.5 |
M |
17.2 |
54.0 |
53.5 |
13 |
6.75 |
N |
17.4 |
54.7 |
55 |
14 |
7 |
O |
18.0 |
56.6 |
56 |
15 |
7.5 |
P |
18.4 |
57.8 |
57.5 |
16 |
8 |
Q |
19.0 |
59.1 |
59 |
17 |
8.5 |
R |
19.2 |
60.3 |
60.25 |
18 |
9 |
S |
19.5 |
61.29 |
62.75 |
19 |
9.5 |
T |
20.0 |
62.8 |
63 |
20 |
10 |
U |
20.3 |
63.8 |
64 |
21 |
10.5 |
V |
*The “International” column reflects the inside-circumference-in-millimeters convention used in many countries and often mirrors the finger-circumference figure.