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A3 Size Dimensions in Inches, cm, mm, and Pixels (Uses and Benefits)


The A3 size is a versatile and widely used paper format that plays an important role in various industries, including printing, design, education, and office work. Whether you’re preparing a professional project, creating artwork, or printing posters, understanding A3 dimensions and their applications is crucial. In this article, we will delve deep into everything you need to know about A3 size, from its exact measurements to practical uses and benefits.


A3 Size Dimensions in Inches, cm, mm, and Pixels

The A3 paper size is part of the ISO 216 standard, which defines the “A” series of paper sizes. This standard is used worldwide, making it easy to standardize printing and document preparation.

The exact dimensions of A3 size are as follows:

  • In millimeters: 297 mm x 420 mm
  • In centimeters: 29.7 cm x 42 cm
  • In inches: 11.7 inches x 16.5 inches
  • In pixels (at 300 DPI): 3508 pixels x 4961 pixels
  • In meters: 0.297 m x 0.420 m

A3 paper is essentially double the size of A4 paper, the most commonly used paper size. If you place two A4 sheets side by side, you will get an A3-sized sheet. This larger size offers more space, making it ideal for projects that require a bigger canvas.

A3 Size dimensions

Common Uses of A3 Size

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