To find your perfect ring size it's recommend that you measure one of your own rings that fit the specific finger that you want your Birka Lexia ring to fit on.
Measure the inside diameter of that ring with a ruler. You can also put the ring on a piece of paper and draw a line very closely along the inside of your ring and measure the diameter that way. Once you have the diameter compare it to the chart below to find your size.
Since the shank width on some of the Birka Lexia rings are broader than the average rings it could be a good idea to rather go up one size than down for a better fit.
All ring sizes in the webshop is shown in Europe Sizes.
If you have any questions about ring sizes don't hesitate to contact me at firstname.lastname@example.org