Inch is the smallest unit of distance in the inch-pound system of measurement customarily used in the United States. There are 12 inches in a foot and 36 inches in a yard. Any distance smaller than an inch is measured in fractions of an inch. The metric system measures short distances in centimeters or millimeters. One centimeter equals 10 millimeters. The inch equals exactly 2.54 centimeters. The symbol for the inch is “.
