Ring Sizing Conversion Chart
Porter Lyons offers ring sizes 3–12 (US). Use this guide to find the correct fit before ordering. For assistance selecting a size, contact us directly.
How to Find Your Size
The most accurate methods:
-
Visit a jeweler to be professionally sized with a ring mandrel.
-
Wrap a thin strip of paper snugly around the base of the finger. Mark where it overlaps, measure flat in millimeters, and match to the circumference column below.
-
If between sizes, size up — especially for wider bands (see Wide Band Sizing below).
Tip: Fingers are largest at the end of the day and in warm weather. Measure then for the most comfortable everyday fit.
Printable Ring Size Guide
Size Chart
|
US
|
UK
|
EU
|
Circumference
|
Diameter
|
|
3
|
F
|
44.0
|
44.0 mm
|
14.0 mm
|
|
3.5
|
G
|
45.5
|
45.5 mm
|
14.5 mm
|
|
4
|
H
|
46.8
|
46.8 mm
|
14.9 mm
|
|
4.5
|
I
|
48.0
|
48.0 mm
|
15.3 mm
|
|
5
|
J 1/2
|
49.3
|
49.3 mm
|
15.7 mm
|
|
5.5
|
K 1/2
|
50.6
|
50.6 mm
|
16.1 mm
|
|
6
|
L 1/2
|
51.9
|
51.9 mm
|
16.5 mm
|
|
6.5
|
M 1/2
|
53.1
|
53.1 mm
|
16.9 mm
|
|
7
|
N 1/2
|
54.4
|
54.4 mm
|
17.3 mm
|
|
7.5
|
O 1/2
|
55.7
|
55.7 mm
|
17.7 mm
|
|
8
|
P 1/2
|
57.0
|
57.0 mm
|
18.1 mm
|
|
8.5
|
Q
|
58.3
|
58.3 mm
|
18.6 mm
|
|
9
|
R
|
59.5
|
59.5 mm
|
18.9 mm
|
|
9.5
|
S
|
60.8
|
60.8 mm
|
19.4 mm
|
|
10
|
T
|
62.1
|
62.1 mm
|
19.8 mm
|
|
10.5
|
U
|
63.4
|
63.4 mm
|
20.2 mm
|
|
11
|
V
|
64.6
|
64.6 mm
|
20.6 mm
|
|
11.5
|
W
|
65.9
|
65.9 mm
|
21.0 mm
|
|
12
|
X 1/2
|
67.2
|
67.2 mm
|
21.4 mm
|
