C4 paper size in mm

What is C4 paper size in mm ?

C4 size in mm is 229x324

The aspect ratio of an C4 paper is 1:1.41,The area of an C4 paper is 74196 mm², Perimeter of an C4 paper is 1106 mm, Diagonal line of an C4 paper is 396.76 mm

Millimeter is a unit of length and a unit of rainfall, abbreviated in English as mm. 1mm=0.1cm=0.01dm=0.001m=0.000001km=1 000μm=1 000 000nm