A3 Paper Size – A3 Size Guide UK

The size of A3 Paper measures 297 x 420 mm (29.7 cm X 42 cm) in the UK.

A3 Size in mm

In millimeters, A3 paper size is 297mm X 420mm.

A3 Size in Centimeters

In centimeters, the dimensions of A3 paper are 29.7 x 42.0 cm.

A3 Size in Inches

When converted to inches, A3 paper size is 11.7 x 16.5 inches.

A3 Size in Pixels

For digital representations, at a standard print quality of 300 dpi (dots per inch), the pixel dimensions of A3 paper are 3508 x 4961 pixels.

Table of A Series Paper Sizes from A0 to A7

Uses and Popularity of A3 Size in the UK

• Professional Printing: A3 is commonly used for professional presentations, charts, and large tables.
• Advertising: It’s ideal for medium-sized posters and displays for events or in-store promotions.
• Academic Use: A3 size is often used for academic posters, project displays, and flip charts.
• Art and Design: Artists and designers frequently use A3 paper for sketches, drafts, and detailed illustrations.

FAQs

What is the A3 size in cm?

The A3 size in centimeters is 29.7 cm by 42.0 cm.

What is the size of A3 paper in inches?

A3 paper measures 11.7 inches by 16.5 inches in size.

How big is an A3 size paper?

An A3 size paper is 297 mm by 420 mm.

What are the dimensions of A3 size paper?

The dimensions of A3 size paper are 297 mm x 420 mm.

What size is A3 paper?

A3 paper is sized at 297 mm x 420 mm.

The A3 paper size is an integral part of the widely adopted international standard known as the ISO 216 series, which originated in the early 20th century. The dimensions of the A3 size, at 297 x 420 mm, make it an incredibly versatile option for a broad range of uses. Twice the size of the standard A4, A3 offers ample space for detailed documents, diagrams, and large displays while still maintaining a manageable size for handling and viewing.

In the UK, the A3 format has cemented its role not only in office environments for reports and presentations but also in the creative industry, where it serves as a canvas for artists and designers. The size is also prevalent in educational settings, particularly for academic posters and group project work. Whether it’s for professional, academic, or personal use, A3 paper is a size that offers both functionality and clarity for its users.