A9 paper size in mm

What is A9 paper size in mm ?

A9 size in mm is 37x52

The aspect ratio of an A9 paper is 1:1.41,The area of an A9 paper is 1924 mm², Perimeter of an A9 paper is 178 mm, Diagonal line of an A9 paper is 63.82 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