The paper industry is broad with a range of paper sizes. The ISO paper format is widely used, and the A-Series international standard paper sizes are popular in a wide range of formats. A4 size paper is the standard paper size format known amongst many, being 210 by 297 mm or 8.3 by 11.7 inches. Check all sizes in the Paper sizes chart with dimensions and measurements

With the ISO A-Series, the width to height ratio is the square root of two and this can be achieved for example, by cutting the type of paper A0 size into two to get A1 paper size. In this case, the consistent aspect ratio is convenient. 

Looking for Postcard dimensions? read it here. Business cards plans and sizing can be found here

standard and international poster sizes can be found here

International Standard For Paper Sizes Chart Explained

Internationally, there are common paper sizes and therefore paper size standards are set to control the size of sheet of paper used as an academic document, writing paper, cards, window envelopes, student notepads, official documents, technical drawings, legal documents, and any other document format. 

 The ISO 216 paper size standard is widely known due to the extensive use of A4 paper sizes. However, it has a series of paper sizes such as A0, A1, A2, A3, A5, and more. It is used globally except in parts of Central and South America e.g. Mexico and North America (the United States and Canada), where they use American paper formats such as “Legal”, “Tabloid”, and “Legal”. To be precise, American systems are different. 

The ISO 269 is the international standard for envelope formats such a C4 envelopes. 

A Series Paper Sizes Chart

This type of paper is defined in ISO 216:2007 international paper sizes standard. The sizes of paper range from A0, the core with the dimensions 841 by 1189 mm (33.1 by 46.8 inches). A0 paper size is the largest size in the ISO A-Series. The ISO paper sizes standard overview of ISO 216:2007 have more paper formats such as A1, A2, A3, A4, A5, A6, and more. 

Please have a look at the different types of papers to the nearest millimeter and inches in the table below. 

B Series Paper Sizes Chart

This type of paper is defined by ISO 216:2007 international paper sizes. B series ISO paper format is not commonly used compared to A series therefore it is less known by many. The geometric mean of the A series gives the B series. The B-series paper size format is commonly used for passports, books, and posters. 

C Series Paper Sizes Format Explained.

This paper type is defined in ISO 269:1985 international paper sizes. It is used to create a series envelopes of different paper size dimensions. When you take the areas of A and B and find the geometric mean the result is the area of the C series piece of paper. 

For example, C4 equals the geometric mean of A4 and B4, meaning C4 has larger paper sizes than the A4 series and is slightly smaller compared to the B4 series. 

International Envelopes Format 

The international envelope formats are defined in ISO 269:1985 international paper sizes. The C4 series is used to create the different envelope formats even for window envelopes. It is important to note that A4 paper sizes fit perfectly in C4 envelopes. 

Untrimmed Paper Size Format 

The untrimmed paper size format is currently defined in ISO 217:2013 international paper sizes. The A and B paper series are trimmed paper sizes. The untrimmed paper sizes are larger than their corresponding A and B series formats. The ISO RA0 paper format has 860 by 1220 mm (33.8 by 48 inches) which represents an area of 1.05 m² while the ISO SRA0 paper format has 900 by 1280 mm (35.4 by 50.4 inches) which represents an area of 1.15 m². The commonly used untrimmed paper formats are RA0 to RA4 and SRA0 to SRA4

SRA and RA Size in Inches and CM.

Video explaining international paper sizes (ISO)

Conclusion. 

In this guide, we have vividly put together the different international standards for paper format. There is a wider range of international paper sizes which have been regularly updated by scientists since the 20th century. To be precise, the German scientist has worked round the clock to ensure we have a standard international paper sizes chart. The traditional sizes have been faced out except for American paper size format used in the American systems. 

Having understood the different series of paper sizes don’t hesitate to ask any questions by leaving a comment below. 

Picture in this post by @shawnanggg on Unsplash

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