The recognised measurement for the diameter of a cigar, based on 64th of an inch. For example, a 48 ring gauge cigar is 48/64ths or two-thirds of an inch thick. The length of a cigar is measured in inches or millimetres.

A cigar is measured by ring gauges which is 1/64 of an inch of the diameter of the thickness of a cigar. Hence a cigar with a 49 ring gauge would have the diameter in thickness of 49/64 inches.

The circumference of a cigar, measured in 64ths of an inch. A 48 ring gauge cigar is 48/64ths of an inch.