Determine your ring size quickly
Note that the printable a bit more acurate
most of the times
Quick way:
Cut a thin strip of paper.
Wrap it around the base of the finger you're planning on wearing the ring.
Mark where the paper overlaps with a pen and measure the length in millimeters with a ruler.
For example, you have 49mm (4.9cm). Now look at the chart above and look for 49.0. It will be equal to US size 5, China & Japan size 9 etc.
Check the chart above