Many paper size standards conventions have existed at different times and in different countries. The A4 size papers are accepted worldwide , except in the US, while the legal sized paper is officially...

The ISO 'A' series of sheet sizes are based on a constant width to length ratio of 1: square root of 2 (value approximately= 1.4142). A4 is the size of a standard business letter, whereas A6 is one...

The size of A5 is half the size of A4 paper according to the ISO 'A' series of sheet sizes, which is based on a constant width to length ratio of 1: square root of 2 (value approximately= 1.4142).

In a trade, the retailer’s and dealer’s function are different, that is a retailer sells the product to the end-user, and dealer buys and then sells the product to the consumer.

The recipients of the products differ in the case of a vendor and a seller. A vendor sells the product to any consumer or end-user, while a seller sells the products to any buyer.