A4 Paper Description
In the 1700s Georg Christoph Lichtenberg suggested that paper sizes should be standardised, possibly the creator of 'scrapbooks' as well which he maintained but were seen by other people after his passing and some of his research is the basis of our later ability to photocopy for which standardised paper is used a lot making all this quite full circle! The paper size usage was furthered by Dr Walter Porstmann post World War I, the size rankings caught on so much they were standardised by the International Organization of Standards under the title 'ISO 216' which is specific to paper and uses the metric system to categorise.
The most common size in paper that is in use today in most countries in the world is the A4 paper as the size is just right for multiple kinds of uses. Used in offices, homes, schools, hospitals and pretty much in any other place needing loose sheets of paper. The standardised dimensions made it easier to formulate the technology around our paper usage. It measures 210 mm wide and 297 mm long (about 8 1/4 x 11 3/4 inches).
Overall dimensions are the same but the thickness of the paper also known as the grammage does vary between brands and at times the thicker paper has a better more classic feel so you can choose which one you want to opt for.