A4 paper is the most commonly used paper size worldwide, except in the United States and Canada where letter-size paper (8.5 x 11 inches) is more prevalent. A4 paper measures 210 millimeters (mm) wide by 297 mm high (approximately 8.27 inches by 11.69 inches).
The A4 paper size is part of the ISO 216 international paper size standard, which is used in most countries across the world. This standard establishes a series of paper sizes that are based on a simple formula: each sheet’s dimensions are obtained by cutting in half the previous sheet’s lengthwise. Thus, the A4 size is the result of cutting an A3 sheet in half, and an A5 sheet is obtained by cutting an A4 sheet in half.
The A4 size is widely used for various applications, including printing documents, brochures, flyers, and books. It is also the standard size for printing many official documents, such as resumes, contracts, and reports.
Overall, the A4 paper size is a convenient and versatile format that is widely used around the world due to its practicality, ease of handling, and compatibility with most printing and copying equipment.
A0
841 × 1189 mm
A1
594 × 841 mm
A2
420 × 594 mm
A3
297 × 420 mm
A4
210 × 297 mm
A5
148 × 210 mm
A6
105 × 148 mm
A7
74 × 105 mm
A8
52 × 74 mm
A9
37 × 52 mm
A10
26 × 37 mm
2A0
1189 × 1682 mm
4A0
1682 × 2378 mm
A0+
914 × 1292 mm
A1+
609 × 914 mm
A3+
329 × 483 mm