To calculate ring sizes, measure the circumference of the finger with a string or a piece of paper. Compare the length of the string to a ring size chart.
- Cut a small piece of string or piece of paper
Cut a length of string approximately 6 inches long. This cannot be a string with any stretch. If such string is not available, a piece of paper about 6 inches long and 1/4 inch wide also works.
- Wrap the string or paper around the finger
Have a friend help if necessary. Wrap the string or strip of paper around the ring finger, pulling it snug but not too tight. Mark the spot where the end of the string or paper overlaps.
- Remove the string or paper and measure
Take the string or piece of paper from around the finger. Hold it up to a ring measuring chart, or use the following measurements: size 5 is 1 1/16 inch, size 6 is 1 1/8 inch, size 7 is 1 3/16 inch, size 8 is 1 1/4 inch, size 9 is 1 5/16 inch, size 10 is 1 6/16 inch, size 11 is 1 7/16 inch, size 12 is 1 1/2 inch, size 13 is 1 9/16 inch, and size 14 is 1 5/8 inch. Men's and women's rings are measured identically.
- Round up to larger size if necessary
If the string method falls between two sizes, choose the larger size for the ring.