The dimensions of the material being cut are determined by the paper format standards and printing presses.
The formats are indicated by basic side x high side
According to the width/height ratio (basic side to high side)the following paper sizes are distinguished:
On the international level the DIN format series (DIN - Deutsche Industrie-Norm) are the most widely used. Other important series are the American, English and Asian sizes.
Criteria of the DIN standard:
The largest format in the A series is A0 which has an area of one square meter.
The aspect ratio of basic side : high side = 1 : = 1 : 1,414
The DIN format series follow the half-area or double-area rules.