A4

The A4 format is a widely used paper size that is used in many different applications. It has a size of 210 x 297 millimeters, making it about half the size of the A3 format and twice the size of the A5 format. A4 is the standard paper size for printing documents, reports, letters, notes, and other text documents.

The aspect ratio of the A4 format is 1:1.4142, which corresponds to the ratio of the other sizes in the A series. This ratio is often considered aesthetically pleasing and can help create a balanced design.

A4 paper is available in various weights and finishes, from thin sheets for general use to heavy paper for professional printing of business cards, flyers, and other marketing materials. The paper can be printed on inkjet or laser printers as well as on professional printing presses.

In schools and offices, A4 paper is often used for daily use. It is the standard format for school notebooks, notepads, calendars, and other stationery products. A4 is also used for creating presentations, reports, and other documents intended for business or academic use.

Another important aspect of the A4 format is that it is typically used as letterhead. It meets the requirements of standard letter envelopes and can be easily folded to fit into these envelopes. This makes it an ideal choice for creating business letters, invoices, quotes, and other business correspondences.

The A4 format is a versatile paper size that is used in many different applications. It has the aesthetically pleasing aspect ratio of 1:1.4142 and is available in various types and weights of paper. It is the standard format for school notebooks, notepads, calendars, stationery products, and documents. It is also popular as letterhead and meets the requirements of standard letter envelopes.