How to find your ring size
If you do not know your ring size, do not worry, it is easy to find out with the guide below. It is best to measure your finger in the afternoon at a comfortable room temperature, because the width of a finger can vary by up to half a size during the day.
Please note: ring sizes on our product pages are given as the inside diameter in millimeters, which corresponds to the first column of the chart below.
Option 1: measure a ring you already have
This is the most accurate way. Take a ring that fits the intended finger well, measure its inner diameter in millimeters with a ruler, and find the closest value in the first column of the chart below.
Option 2: measure your finger
- You need a non-stretchy string or a 3–4 mm wide strip of paper, a ruler and a pen
- Wrap the string around the base of your finger, not too tightly, and mark the point where the ends meet
- Measure the length up to the mark in millimeters, this is your finger circumference
- Repeat the measurement around the knuckle, since the ring has to slide over it, and use the larger of the two values
- Find the closest circumference in the chart below, and choose the size from the first column
Between sizes? Choose the larger one, especially for wide rings, which sit tighter on the finger than thin bands of the same size.
Diameter (mm)
our size |
Size US |
Circumference (mm)
Size EU |
Size UK / AU |
| 14 |
3 |
43.9 |
F |
| 14.5 |
3½ |
45.5 |
G |
| 15 |
4¼ |
47.1 |
H½ |
| 15.5 |
4¾ |
48.6 |
J |
| 16 |
5½ |
50.2 |
K½ |
| 16.5 |
6 |
51.8 |
L½ |
| 17 |
6½ |
53.4 |
M½ |
| 17.5 |
7¼ |
54.9 |
O |
| 18 |
7¾ |
56.5 |
P |
| 18.5 |
8½ |
58.1 |
Q½ |
| 19 |
9 |
59.6 |
R½ |
| 19.5 |
9¾ |
61.2 |
T |
| 20 |
10¼ |
62.8 |
U |
| 20.5 |
11 |
64.4 |
V½ |
| 21 |
11½ |
65.9 |
W½ |
| 21.5 |
12 |
67.5 |
X½ |
| 22 |
12¾ |
69.1 |
Z½ |
Not sure about your size? Write to support@alohagaia.com and we will help you choose.
