C7 paper size in mm

What is C7 paper size in mm ?

C7 size in mm is 81x114

The aspect ratio of an C7 paper is 1:1.41,The area of an C7 paper is 9234 mm², Perimeter of an C7 paper is 390 mm, Diagonal line of an C7 paper is 139.85 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