Ring Size Chart
The easiest way to measure your ring size is to take an existing ring and measure inside diameter in millimeters. In the image below, you can see the ring size corresponding to your measurement.
Ring Size-measuring Tool:
Print out the Ring Size guide and cut out the sizing tool. Slide the end tab 'B" through slot 'A" and wrap the sizer around the base of the finger. Make sure to allow size for the knuckle. The number aligned with slot 'A" is your ring size.