Figure out ring size by measuring the finger while at room temperature, cutting a non-stretchy string to about 6 inches long, and wrapping the string around the base of the finger. Mark the string with a pen, and then compare it to a ring size guide, which may be found online.Continue Reading
If the finger is hot or cold, allow it settle to room temperature. Fingers expand and contract depending on the temperature, preventing an accurate measurement.
Find a non-stretchy string, measure it to 6 inches long, and cut it. If no string is available, use a 6-inch long piece of paper that is no wider than ¼ inch.
Place one end of the string on the base of the finger the ring is to go on, and wrap the string around it. Make sure the string is snug but avoid making it too tight.
Mark the spot where the end meets the string with a pen. Cut the string on the mark.
Use a ring-sizing chart by holding the cut string up to the lines. When you find a match, make note of the size.