Homonym: A_4 (Pitch)
A_4 is a standard paper size commonly used in many countries around the world. It measures 210 millimeters in width and 297 millimeters in height, which is approximately 8.27 inches by 11.69 inches. A_4 paper is part of the ISO 216 standard, which defines various paper sizes based on the metric system.
This paper size is widely utilized for printing documents, letters, and forms. It is often used in offices, schools, and homes due to its convenient dimensions. A_4 paper can also be easily folded to create A_5 size, making it versatile for various applications.