
Australia, like many other countries, uses paper sizes from the A-series, such as A4, A3, and A5. The A-series is the most common paper size class in Australia, with A4 being widely adopted as the standard document size for printing. Each size down from A0 (the largest in the series) is half of the previous size. Paper sizes work on a reverse scale, meaning that the larger the number, the smaller the size. A4 is the most used paper size worldwide, measuring 210 x 297mm, or 8.3 by 11.7 inches.
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What You'll Learn

A4 paper is the standard size in Australia
A4 is the standard paper size in Australia. It measures 210mm by 297mm or 8.3 by 11.7 inches. This sheet type has become the standard for documents and forms worldwide. It is widely used in many countries in Europe and Asia as well. A4 is part of the A-class series of paper sizes, which are determined by their ratios. Each paper size in the series is half of the previous one. So, A4 is half of A3, A5 is half of A4, and so on. The A-series covers a wide range of sizes, each with its own dimensions and unique applications.
A4 paper is used for a wide variety of purposes, including printing booklets, documents, reports, resumes, and forms. It is also the standard size for many other types of printed materials, such as flyers, brochures, and menus. When creating any kind of printed material, it is important to consider how the size will accommodate the content and graphics, and how it will influence the project's readability and aesthetic appeal.
While A4 is the standard, there are also non-standard sizes available for printing in Australia. These include square formats (e.g. 210mm x 210mm), custom sizes (e.g. 125mm x 325mm), die-cut shapes (e.g. heart, star), and folded formats (e.g. gatefold, tri-fold, or Z-fold). These non-standard sizes can be used to create unique marketing materials or prints that require a personal touch.
In addition to the A-series, there are two other series of paper sizes that can be used when the A-series is not suitable: the B-series and the C-series. The B-series is mostly used by the printing industry, while the C-series is generally used for envelopes.
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A3 is bigger than A4
The standard paper size in Australia is A4, which measures 210 x 297 millimetres (8.3 x 11.7 inches). This is the standard letter-size paper commonly used for documents, letters, and reports. However, A3 paper is bigger than A4.
A3 paper size measures 297 x 420 millimetres (11.7 x 16.5 inches). This is twice the size of A4 paper, which is only 8.3 x 11.7 inches. A3 paper is commonly used for posters, charts, engineering drawings, and other large documents. It is also a versatile size for small posters, signs, folded leaflets, and menus. A3 paper can be useful for presentations and as a visual aid during office meetings.
A3 printers are more expensive than A4 printers due to their larger print capabilities and features. A3 printers are often used in businesses, design studios, and other professional settings to print large documents and graphics. A3 multifunction printers (MFPs) are generally larger and heavier than A4 MFPs, so it is important to consider the available space when choosing an A3 printer.
A3 and A4 paper sizes are part of the "A" series of paper sizes, which was standardised in 1975 by the International Organization for Standardization (ISO). The ISO defined a series of standard paper sizes, including the "A," "B," and "C" series, which are widely used around the world. Paper sizes within the A-Series are determined by their ratios, with each size being half of the larger size. For example, folding an A0 size sheet creates an A1 size, and folding an A1 size creates an A2 size, and so on.
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A-series paper sizes are determined by their ratios
Paper sizes in the A-series are determined by their ratios. The A-series is a widely recognised paper size standard, defined by a consistent aspect ratio of the square root of 2. This means that each paper size is a perfect half of the larger size. For example, folding an A0 size sheet in half creates an A1 size sheet, folding an A1 size sheet creates an A2 size sheet, and so on. The A-series paper sizes are based on the square root of two, which ensures that two pieces of paper with the same proportions can fit perfectly together when placed alongside one another.
The A-series paper sizes were first proposed in the 18th century by German scientist Georg Christoph Lichtenberg in 1786. The idea was formalised in 1975, and the standard allows for scaling between sizes without distortion. The A-series paper sizes are used throughout the world and are based on an international standard known as the ISO 216 standard. This standard was originally proposed in Germany in the late 18th century as DIN 476 and was later adopted internationally for its mathematical precision.
The A-series paper sizes are determined by their ratios, with each size being half of the previous size. This reverse scaling means that the larger the number, the smaller the size. For example, A0 is the largest standard size and is comparable to a tabletop in size, while A1 is half the size of A0 and is comparable to a small, freestanding desktop. The most commonly used ISO paper size is A4, which is comparable to a laptop screen in size.
The A-series paper sizes are determined by their ratios and can be visualised by comparing each size in relation to the paper size that is one grade larger. For example, A3-sized paper can be visualised by placing two A4-sized papers next to each other. This allows for a better understanding of the size of each A-series paper size and how they relate to one another.
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Paper weight is measured in gsm
GSM is a term that is commonly used when choosing the right type of paper and cardstock for your project. The higher the GSM, the heavier and thicker the paper. For example, newspaper is usually 35-55gsm, standard copier paper is 80-90gsm, and business cards are around 300gsm. The weight of the paper can also impact the impression you make on your customers, as heavier paper is generally perceived as being of higher quality.
When choosing your paper weight, it's important to consider the different types of paper available based on their weight. Everyday office copier and printer paper tends to be 80-100gsm, while stationery like letterheads and compliment slips are usually printed on 100-120gsm paper. Thicker 130-170gsm art paper is often used for flyers, leaflets, and brochure pages. For business cards, a weight of 300-400gsm is recommended.
The thickness of paper is measured in microns, where 1 micron = 1/1000 of a millimetre. However, GSM is not an indication of paper thickness. For example, one brand of 100gsm paper may not be the same thickness in microns as another brand of 100gsm paper due to differences in the manufacturing process, fibres used, and type of wood pulp.
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B-series paper is used for booklets, invitations and promotional materials
The B-series paper sizes are defined by the ISO 216 International Standard for paper sizes. It is used as an alternative when the commonly used A-series paper is not suitable. The B-series is mostly used by the printing industry and is especially relevant for special uses such as booklets, invitations, promotional materials, and posters.
The B-series is a good option when the A-series is either too big or too small for the document you're working on. The sizes offered by the B-series are between each of the A-series paper sizes. For example, B5, a common choice for books, measures between A4 and A5.
B-series paper is also used for envelopes and passports. Its dimensions follow the same concept as the A-series, where folding a sheet of paper in half results in the next smallest size. So, B3 is half of B2, B2 is half of B1, and so on.
While the B-series is less frequently used in office settings, its aspect ratio is 1:√2, the same as the A-series. This means that the B-series can be a versatile option for various printing projects where the A-series is not suitable.
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Frequently asked questions
The standard paper size in Australia is A4, which measures 210mm by 297mm (8.3 by 11.7 inches).
The A-series is the most common paper size class in Australia, with A4 being widely adopted as the standard document size for printing. The A-series covers a wide range of sizes, from A0 to A10, each with its own dimensions and applications. Each paper size in the A-series is half of the previous size. For example, A1 is half of A0, and A2 is half of A1.
A4 paper is used for a wide variety of purposes, including printing booklets, documents, reports, resumes, and forms. It is also the standard size for many other countries in Europe and Asia.









































