We have 2 methods to know the size of the ring of your wedding ring or ring, check below and be sure to read our
tips (at the bottom of the page) about the influence of climate on your hands.

IMPORTANT: The numbering variation is in millimeters, so it is very important that the methods below are applied carefully.

To avoid any mistake, always confirm the measurements by using a Ring in any jewelry store, so there will be no error since the numbers are universal.

Method 1 - Inner diameter of the rings in mm
(Attention: Measure only the INTERNAL part of the ring, do not measure the part of the edges.)

​

​

​

​

 

Alliance Size Measured in mm of diameter Alliance Size Measured in mm of diameter

10 14.80 mm 23 19.20 mm
11 15.20 mm 24 19.50 mm
12 15.50 mm 25 19.90 mm
13 15.80 mm 26 20.20 mm
14 16.20 mm 27 20.50 mm

15 16.50 mm 28 20.80 mm
16 16.80 mm 29 21.20 mm
17 17.20 mm 30 21.50 mm
18 17.50 mm 31 21.80 mm
19 17.80 mm 32 22.20 mm
20 18.20 mm 33 22.50 mm
21 18.50 mm 34 22.80 mm
22 18.80 mm 35 23.20 mm

  Method 2: String / Ribbon around the Finger:

1 - Go around your finger joint with string, thread or some kind of flexible wire.

2 - Mark the exact measurement of the circumference of your finger

3 - Extend the wire over a ruler and read the marked length.
4 - Look in the table below for the number corresponding to the measure.


Ring Size Measured in cm
10 5.00 cm
11 5.10 cm
12 5.20 cm
13 5.30 cm
14 5.40 cm
15 5.50 cm
16 5.60 cm
17 5.70 cm
18 5.80 cm
19 5.90 cm
20 6.00 cm
21 6.10 cm
22 6.20 cm
23 6.30 cm
24 6.40 cm
25 6.50 cm
26 6.60 cm
27 6.70 cm
28 6.80 cm
29 6.90 cm
30 7.00 cm
31 7.10 cm
32 7.20 cm
33 7.30 cm
34 7.40 cm
35 7.50 cm