Ring Size Guide
Use this chart to convert between UK letters, US sizes, and EU sizes, or match your finger measurement in millimetres to the correct size.
|
UK Size |
US Size |
EU Size |
Inside Circumference (mm) |
|
A |
0.5 |
37.5 |
37.8 mm |
|
B |
1 |
38 |
38.5 mm |
|
C |
1.5 |
39 |
40.2 mm |
|
D |
2 |
40 |
41.5 mm |
|
E |
2.5 |
41 |
42.7 mm |
|
F |
3 |
42 |
44.0 mm |
|
G |
3.5 |
43 |
45.2 mm |
|
H |
4 |
44 |
46.5 mm |
|
I |
4.5 |
45 |
47.8 mm |
|
J |
5 |
49 |
49.0 mm |
|
K |
5.5 |
50 |
50.3 mm |
|
L |
6 |
51 |
51.5 mm |
|
M |
6.5 |
52 |
52.8 mm |
|
N |
7 |
54 |
54.0 mm |
|
O |
7.5 |
55 |
55.3 mm |
|
P |
8 |
56 |
56.5 mm |
|
Q |
8.5 |
57 |
57.8 mm |
|
R |
9 |
58 |
59.0 mm |
|
S |
9.5 |
60 |
60.3 mm |
|
T |
10 |
61 |
61.5 mm |
|
U |
10.5 |
62 |
62.8 mm |
|
V |
11 |
63 |
64.0 mm |
|
W |
11.5 |
65 |
65.3 mm |
|
X |
12 |
66 |
66.6 mm |
|
Y |
12.5 |
67 |
67.8 mm |
|
Z |
13 |
68 |
68.5 mm |
How to measure your ring size at home.
You will need:
• A piece of string or thin paper strip
• A ruler (mm)
• A pen
Steps:
1. Wrap the string around the base of the finger you want to measure.
2. Mark where the string meets.
3. Lay it flat and measure the length (in millimetres).
4. Use the conversion chart above to find your closest UK ring size.
Tips:
• Measure at the end of the day when your hands are warm (fingers are slightly bigger).
• Measure the same finger 2–3 times for accuracy.
• If you’re between sizes, choose the larger size.