A4 paper size in cm

What is A4 paper size in cm ?

A4 size in cm is 21x29.7

The aspect ratio of an A4 paper is 1:1.41,The area of an A4 paper is 62370 mm², Perimeter of an A4 paper is 1014 mm or 101.4 cm, Diagonal line of an A4 paper is 363.74 mm or 36.374 cm

Centimeter is a unit of length measurement, equal to one hundredth of a meter, the English symbol that is abbreviated as: cm., 1 cm = 1/100 m. 1cm = 10mm = 0.1dm = 0.01m