What Are the A0 Poster Size Inches?

A0 poster size inches are about 33.1 x 46.8, defined by ISO standards.

What Is the Aspect Ratio of A0 Paper?

The aspect ratio of A0 is 1:√2, ensuring consistent proportions across all paper sizes in the series.

Is the A0 Size Used for Printing Posters and Banners?

Yes, A0 is a standard size for printing posters, exhibition banners, and architectural drawings.

How Does A0 Size Compare to USA and Canada Paper Sizes?

A0 paper size is based on ISO 216 and may differ from standard paper sizes commonly found in the USA and Canada.

Can an A0 Poster Be Folded or Cut to Produce Smaller Sizes?

Yes, folded in half it becomes A1, then further to A2, maintaining standard aspect ratio for each size.

What Is the Thickness of a Standard A0 Poster Sheet?

A0 thickness depends on paper weight chosen for printing, but dimensions remain fixed at 841 mm x 1189 mm.

Where Can I Print Large A0 Size Posters?

Many commercial printing companies and online services offer A0 poster printing with customizable file upload options, while A2 posters are ideal for modern art prints and stylish wall decor. Most sign holders will be made to accommodate metric paper as a standard, ensuring compatibility with A0 and other A-series sizes.

Is A0 bigger than A1?

Yes. A0 is larger than A1. In the ISO A-series, each size down is exactly half the area of the one above it, so A1 is half the size of A0.

A0 measures 84.1 × 118.9 cm (or 118.9 × 84.1 cm in landscape). It’s designed to have a 1:√2 aspect ratio, which keeps proportions consistent across the A-series.

An A0 frame fits an A0 print: 84.1 × 118.9 cm (approximately 33.1 × 46.8 inches). If you’re framing a poster, check whether the frame size listed is the visible opening (exact fit) or the outer size, and allow for a mount/mat if you want a border.

What’s the closest US size to A0?

The closest common US size to A0 is 33 × 47 inches. A0 is 33.1 × 46.8 inches, so it’s extremely close, just slightly different. For a perfect fit, use an A0 frame; for US frames, 33 × 47 often works with a small trim or a mat.

A0 measures 841 × 1189 mm (or 1189 × 841 mm in landscape).

A0 Size in Inches & CM: 33.1 x 46.8 in (84.1 x 118.9 cm)

A0 Poster Size Inches

A0 is the right choice when you want a true statement wall, with scale for living rooms, studios and commercial spaces. Use the measurements below, then browse our A0 posters for oversized art prints.

By Tony Musso, Art Director · 4 min read

Yayoi Kusama Art, framed on the wall of a modern city flat living room with a white wall and a dark wood floor

Shown: Jellyfish Symphony, from £16.00 →

If you need to understand the A0 poster size inches for printing professional posters or banners, knowing precise measurements is essential. A0 is the largest format in the ISO 216 series and is frequently used in various industries for creating impactful, high-quality graphics. This article explains every detail about A0 size, from exact dimensions and aspect ratio, to its broad use in posters, banners, and large-format print jobs.

Quick answer: A0 size is 841 × 1189 mm (that’s 84.1 × 118.9 cm or 33.1 × 46.8 inches). The closest common US poster/frame size is 33 × 47 inches.

Shop A0 posters → Large-format wall art prints at 84.1 × 118.9 cm.

A0 poster size inches

The A0 poster size in inches measures approximately 33.1 x 46.8. These proportions make it highly suitable for posters, point-of-sale banners, and other promotional material requiring a large sheet. When converted, this standard paper size accommodates a broad variety of design purposes.

You can find A0 posters both in the USA and Canada, though the exact size used there may sometimes differ from international standards. To ensure your file fits, always double-check the measurements before sending for printing, especially with large images or graphics. The A series paper sizes are adopted worldwide, excluding the USA and Canada, where different standards are more common.

Paper Size

Within the ISO 216 standard, A0 paper size is the largest in the A series. The dimensions are defined at 841 mm width by 1189 mm height. This standard originated to simplify printing and cutting for various paper sizes and to make it easy to fold sheets down to smaller formats. Additionally, A0 paper has an area of nearly 1 m², making it ideal for large-scale applications.

Common paper sizes like A0, A1, and A2 reflect a simple process: each size is exactly half the area of the previous one, and the proportions remain the same. For example, cutting or folding an A0 sheet in half yields an A1 paper size.

Aspect ratio

The classic ISO series has an aspect ratio of 1:√2, meaning the proportions of width to height remain consistent as A0 is folded down through other series. This ratio is key in creating posters and banners, as it ensures printed images and files fit any size in the a-series without distortion.

Using these aspect ratios allows designers to adapt their files across multiple paper sizes, retaining image quality and ease of print setup.

1189 mm

One of the defining A0 poster size measurements is 1189 mm in height. When combined with the 841 mm width, the total area of the sheet is a perfect fit for large-scale posters or banners, allowing graphic elements plenty of space for visual impact.

A0 size

The A0 size paper is widely selected for printing posters, banners, and blueprints. The dimensions are 841 mm x 1189 mm or, in inches, 33.1 x 46.8. Whether folded or cut, this versatile size maintains proportional balance, ideal for large-format prints.

Printing files formatted at A0 guarantees resolution and quality that meet the standards of industries needing impactful and readable graphics. Large format printers known as ‘plotters' are commonly used to print in A0 format, ensuring precision and high-quality output for professional needs. There are many different types of display holders that can show off your posters, making it easier to present your work in various settings.

841 x

The 841 x 1189 mm measurement is the official A0 sheet size according to ISO. Such defined measurements allow easy scaling for a variety of printing applications.

420 x

When an A0 sheet is folded or cut in half, it becomes a 594 x 841 mm A1 size, and then 420 x 594 mm for A2. This sequence supports efficiency in both printing and cutting processes, with precise width and height ratios throughout each step. Similarly, cutting an A4 paper in half creates two A5 sheets, following the same proportional logic.

594 x

The 594 x 841 mm dimension is a key measurement in the standard series when folding down from A0 to A1 and then to A2 (420 x 594 mm). A0’s flexibility is enhanced by these sizes, making the series a staple in printing industries across the world for posters, banners, and large-scale image files