What does A4 size paper mean?

A4 size paper meaning in Business Dictionary

the conventional size of typing report used by the Overseas Standards business. It steps 210 mm wide and 297 mm longl (about 8 1/4 x 11 3/4 inches). Its utilized in most nations of the world, except the usa and some neighboring nations where letter-size report (8 1/2 x 11 inch) is used. See in addition paper sizes.