Sizing info. What is my Ring Size?
To measure your finger size, use a THIN RING that fits well.
The ring you measure, should not be wider than 3mm in total. [A thin wedding band works well.]
Position the ring on top of a ruler, with the mm lines running through the middle of the ring, like in the example.
Measure exactly in the middle of the ring.
Measure just the opening ['Inside Diameter'], carefully in mm.
We do not measure the ring itself, just the opening...
The ring on the picture is about 19.5mm.
We then look up the alphabetical equivalent on Wikipedia Ring Sizes. 19.5mm, for example, is a size P.
It is always best to have your finger professionally measured at a jeweller though...
Hope this helps!