7 inches is equal to 23.33 centimeters, and inches used in Hong Kong, Macao and other regions generally refer to inches. At this time, the length of one inch is 2.54 cm, and the length of seven inches is 17.78 cm. "Inch" is a traditional unit of length in China, with feet and feet in decimal (10 inch = 1 foot, 10 foot = 1 foot).

Inch, a municipal unit of length. 10 inch equals 1 foot, 1 inch is about 3.33 cm, and 1 meter equals 30 inches.

A centimeter is a unit of length measurement, equal to one hundredth of a meter. The unit of length, abbreviated as cm. ， 1cm = 1/ 100m。 1cm (cm) = 10mm (mm) =0. 1dm (decimeter) =0.0 1m (meter).

Unit conversion of centimeter:1cm =10 mm =10000 micron = 1000000 nanometer =0. 1 decimeter = 0.01m = 0.0000/.