The dimensions of the C3 paper size are: the height of 324 mm and the width of 458 mm. The size of the discussed template may be also presented in inches. Then, the aforementioned values have to be changed to 12.76″ x 18.03″. If one wants to print a material in the C3 format in 300 DPI, he or she has to remember that its digital size will be 3827 x 5409 px. In the further part of this index, one may also familiarize oneself with the dimensions of other C series sheets of paper.