How to measure your finger size to buy a ring.
Step 1: Cut a strip of paper half a centimeter thick by about ten centimeters long.
Step 2: Wrap it around the finger where you want to wear the ring and mark with a pen the point where you want to wear the ring.
Step 3: Now, unfold it on a ruler and measure from the end to the mark. In the table you will find the size reference.
Step 4: One more step to confirm your size: if you have a ring that fits your finger size, measure its inner diameter and find your size in the reference table.