The most common printer paper sizes are:

• Letter size : 8.5 x 11 inches (21.59 x 27.94 cm), widely used in the United States for everyday printing tasks like reports and homework

• A4 size : 210 x 297 mm (8.3 x 11.7 inches), the international standard used in most countries outside the US, suitable for documents and letters

Other standard sizes include:

• Legal size : 8.5 x 14 inches, often used for legal documents in the US

• A3 size : 297 x 420 mm (11.7 x 16.5 inches), larger than A4, used for drawings or large prints

The A-series paper sizes follow a consistent pattern where each size is half the area of the next larger size, with A4 being the most common standard for printer paper internationally

. In summary, standard printer paper is typically about 8.5 by 11 inches (Letter) or 210 by 297 mm (A4), depending on the region and printer requirements