Find the International Standards for Paper Sizes
We covered all international standards for paper sizes, dimensions and formats.
Paper Sizing Converters
Aspect Ratio
Digital Output Pixels
Paper Sizing Categories
Find all global standards, regional systems, and historical paper formats. Click on any category to explore detailed paper size charts.
A Paper Sizes
B Paper Sizes
US Paper Sizes
C Envelope Paper Sizes
Photography Paper Sizes
US Envelope Paper Sizes
International Envelope Paper Sizes
Books Paper Sizes
Newspaper Paper Sizes
Business Card Paper Sizes
DIN Paper Sizes
Japanese Paper Sizes
Chinese Paper Sizes
French Paper Sizes
Colombian Paper Sizes
Canadian Paper Sizes
Traditional British Paper Sizes
Swedish Paper Sizes
Transitional Paper Sizes
Imperial Paper Sizes
Billboard Paper Sizes
Raw Paper Sizes
Frequently Asked Questions
Find answers to the most common questions about international and regional paper sizing systems, dimensions, and standard formats.
What are the standard paper sizes?
Standard paper sizes are predefined dimensions used for printing, documents, publishing, envelopes, and other applications. Common standards include the international A series such as A4 and A3, the B and C series, and US paper sizes such as Letter and Legal.
What is the difference between A4, Letter, and Legal paper sizes?
A4, Letter, and Legal are common paper formats with different dimensions. A4 measures 210 × 297 mm, Letter measures 8.5 × 11 inches, and Legal measures 8.5 × 14 inches. A4 is widely used internationally, while Letter and Legal are common in the United States and Canada.
What are the international paper size standards?
International paper sizes include several standardized systems, including ISO A and B series, C envelope sizes, DIN sizes, and other regional standards. The ISO A series is one of the most widely used systems worldwide.
What are the different paper size series?
Paper sizes are organized into different series and standards, including A, B, and C series, US sizes, DIN, Japanese, Chinese, Canadian, French, Swedish, transitional, imperial, and other regional or specialty formats.
How are paper sizes measured?
Paper sizes are commonly measured by their width and height in millimeters, centimeters, or inches. Paper sizes can be compared using different measurement units to understand the dimensions of each format.
What is the difference between ISO and US paper sizes?
ISO paper sizes, such as A4, follow international standards based on a consistent aspect ratio. US paper sizes, such as Letter and Legal, use different dimensions and are primarily used in the United States and some nearby regions.
How can I find the dimensions of a paper size?
You can use the paper sizing index to find a specific paper format and view its exact dimensions. Paper sizes are organized by category and standard, making it easier to find formats such as A4, Letter, envelopes, photography sizes, and specialty formats.
What paper size should I use for printing?
The right paper size depends on what you are printing and the standard required by your printer, document, or region. A4 is common for general documents internationally, while Letter is widely used in the US and Canada. Other formats are used for posters, books, envelopes, photographs, newspapers, and specialty printing.
What are paper sizes used for?
Paper sizes are used for many purposes, including documents, letters, books, envelopes, photographs, newspapers, business cards, posters, printing, and publishing. Different industries and countries use different paper size standards.
Are paper sizes the same in every country?
No. Paper sizes vary by country, region, and industry. A4 is widely used internationally, while countries such as the United States use formats such as Letter and Legal. There are also specific standards for Japan, China, Canada, France, Sweden, and other regions.
What are envelope paper sizes?
Envelope sizes are standardized formats designed to hold specific paper sizes and documents. Common systems include the international C series and US envelope sizes. The appropriate envelope size depends on the document or paper being inserted.
Where can I find a complete list of paper sizes?
You can browse the Sizing Catalog to explore paper sizes by standard and category, including A, B, US, C envelope, photography, books, newspapers, business cards, DIN, Japanese, Chinese, French, Canadian, Swedish, imperial, and other formats.