1. Take an existing ring that perfectly fits your desired finger.
2. Measure the inside diameter of that ring.
3. See the chart below to determine your perfect Ring size.
Internal Diameter (MM)
14.1
|
14.9
|
15.7
|
16.5
|
17.3 | 18.3 | 19 |
US/Canada Ring Size |
3
|
4
|
5
|
6
|
7 | 8 |
EU Ring Size |
14
|
15
|
15 3/4
|
16 1/2
|
17 1/4 | 18 |
UK/Australia Ring Size |
F
|
H
|
J
|
L
|
N | P |