How are cigars measured? Ring gauge,
or the diameter of a cigar, is measured in 64ths of an inch. So for example, a
cigar that has a ring gauge of 42 is in fact 42/64ths of an inch in diameter.
In some countries, diameter is expressed in millimeters. Length is expressed in
different units depending on where in the world you are buying a cigar. In the
U.S., length is given in inches. In many other countries, length is expressed
in centimeters.