C Paper size calculator

c paper introduction

The basis for the development of the C series is the A series and B series of sizes for geometric averaging and derived. For example, C4 paper size is the geometric mean of A4 and B4 size, and the paper aspect ratio is still the square root of 2:1.
In this way, C4 size system between A4 and B4, A4 paper can be loaded into the C4 size of the envelope bag, while C4 paper can be loaded into the B4 size of the envelope bag.