In Australia the “A Series” is the accepted paper size series for printing and we will explain the different sizes here. It is actually quite a simple and logical system and using our graph below will help you visualise the page sizes compared to a standard A4. What you will notice is the A-series sizes are based upon the A4 sheet, and each increase in size is double the size below it:
• A3 is twice the size of A4.
• A2 is twice the size of A3, and four times the size of A4.
• A1 is twice the size of A2, and eight times the size of A4; and
• A0 is twice the size of A1, and sixteen times the size of A4.