Ring Sizes
Please make sure you know your correct ring size before placing an order. If you’re unsure of your size, we recommend getting measured by a professional jeweler, ideally one that regularly works with engagement rings and fine jewelry.
When you’re measured, ask for the inside diameter or inside circumference in millimeters (mm) in addition to the standard ring size. Ring size scales vary slightly between jewelers but millimeter measurements allow us to match your size more precisely using our in-house measurements, as shown in the chart below.
It’s best to get measured when your hands are at a normal temperature, since fingers shrink in the cold and swell in heat. If you fall between sizes, it can be helpful to know both measurements. Wider bands tend to fit more snugly, so it also helps to mention the style of ring you’re considering. If you already have a ring that fits well, a jeweler can measure its inside diameter in millimeters, which works just as well.
|
Ring Size (US) |
Inside Circumference (mm) |
Diameter (mm) |
UK |
|
3 |
44.4 |
14.1 |
F |
|
3.25 |
45.1 |
14.3 |
F 1/2 |
|
3.5 |
45.7 |
14.5 |
G |
|
3.75 |
46.3 |
14.7 |
G 1/2 |
|
4 |
46.9 |
14.9 |
H |
|
4.25 |
47.6 |
15.1 |
H 1/2 |
|
4.5 |
48.2 |
15.3 |
I |
|
4.75 |
48.8 |
15.5 |
J |
|
5 |
49.4 |
15.7 |
J 1/2 |
|
5.25 |
50.1 |
15.9 |
K |
|
5.5 |
50.7 |
16.1 |
K 1/2 |
|
5.75 |
51.3 |
16.3 |
L |
|
6 |
52.0 |
16.5 |
L 1/2 |
|
6.25 |
52.6 |
16.7 |
M |
|
6.5 |
53.2 |
16.9 |
M 1/2 |
|
6.75 |
53.8 |
17.1 |
N |
|
7 |
54.5 |
17.3 |
N 1/2 |
|
7.25 |
55.1 |
17.5 |
O |
|
7.5 |
55.7 |
17.7 |
O 1/2 |
|
7.75 |
56.4 |
17.9 |
P |
|
8 |
57.0 |
18.1 |
P 1/2 |
|
8.25 |
57.6 |
18.3 |
Q |
|
8.5 |
58.2 |
18.5 |
Q 1/2 |
|
8.75 |
58.9 |
18.7 |
R |
|
9 |
59.5 |
18.9 |
R 1/2 |
|
9.25 |
60.1 |
19.1 |
S |
|
9.5 |
60.8 |
19.3 |
S 1/2 |
|
9.75 |
61.4 |
19.5 |
T |
|
10 |
62.0 |
19.7 |
T 1/2 |
|
10.25 |
62.6 |
19.9 |
U |
|
10.5 |
63.3 |
20.1 |
U 1/2 |
|
10.75 |
63.9 |
20.3 |
V |
|
11 |
64.5 |
20.5 |
V 1/2 |
|
11.25 |
65.2 |
20.7 |
W |
|
11.5 |
65.8 |
20.9 |
W 1/2 |
|
11.75 |
66.4 |
21.1 |
X |
|
12 |
67.0 |
21.3 |
X 1/2 |
|
12.25 |
67.7 |
21.5 |
Y |
|
12.5 |
68.3 |
21.7 |
Y 1/2 |
|
12.75 |
68.9 |
21.9 |
Z |
|
13 |
69.6 |
22.1 |
Z 1/2 |