To define your ringsize
We use the european norms and our ringsizes of our rings are meassured at the inside of the ring in millimeters.
To measure your ringsize you can use one of the 2 below ways, you can use the table to convert it into the right size.
1) Put a ring which has a good fit on a ruler and read the inside diameter from the ruler like the picture below.
The inside diameter is your ringsize. (A brought ring feels smaller around your finger, so at least take it half a millimeter bigger. For a very small ring it should be the other way around, half a millimeter smaller).
2) If you do not have a ring which has a good fit you can also use a piece of string or a small ribbon to measure your ringsize. Wrap the string around your finger (not too tight and mind the knuckle) and measure the length of the string on a ruler. Via below table you can define your ringsize.