What is Normal Paper Size?
Table of Contents
If you’ve ever purchased paper for printing or used a photocopier, you’ve probably come across terms like “letter size” or “A4 size.” These terms refer to paper sizes, which are standardized measurements used to determine the dimensions of a sheet of paper. Understanding paper size is essential for choosing the right type of paper for your printing needs, avoiding printing errors, and ensuring that your printed documents look professional.
History of Paper Size

The first standardized paper size system was developed in China during the Han Dynasty (202 BC – 220 AD). The system used rectangular sheets of paper with specific proportions, which were used for writing and printing. In the 20th century, paper size standards were developed in Europe and later adopted globally.
The current international standard for paper sizes is ISO 216, which was first introduced in 1975. ISO 216 specifies a set of standard paper sizes that are based on the A series of paper sizes. The A series is the most commonly used paper size standard worldwide and includes sizes A0 to A10. The A0 size has an area of one square meter, and each subsequent size is half the area of the previous size. For example, A4 is half the size of A3, and A5 is half the size of A4.
Common Paper Sizes
Letter Size
Letter size is the most commonly used paper size in North America, and it measures 8.5 inches by 11 inches (216 mm by 279 mm). Letter size paper is used for printing documents such as letters, memos, and resumes.
Legal Size
Legal size paper measures 8.5 inches by 14 inches (216 mm by 356 mm) and is used for printing legal documents, such as contracts and agreements. Legal size paper is longer than letter size paper and is sometimes referred to as “long” paper.
Note: Example and quote can be added to support the argument.
Common Paper Sizes Cont’d
A4 Size
A4 size is the most commonly used paper size outside of North America and measures 210 mm by 297 mm (8.27 inches by 11.69 inches). A4 size is used for printing documents such as letters, invoices, and reports.
Tabloid Size
Tabloid size paper measures 11 inches by 17 inches (279 mm by 432 mm) and is commonly used for printing newspapers, newsletters, and posters. Tabloid size paper is twice the size of letter size paper and is also referred to as “ledger” or “B size” paper.
Executive Size
Executive size paper measures 7.25 inches by 10.5 inches (184 mm by 267 mm) and is used for printing resumes, stationery, and other professional documents. Executive size paper is slightly smaller than letter size paper and is commonly used in the corporate world.
Other Paper Sizes
Envelope Sizes
Envelopes come in a variety of sizes, with the most common being C4, C5, and DL sizes. C4 envelopes measure 229 mm by 324 mm (9 inches by 12.75 inches) and are used for mailing unfolded A4 size documents. C5 envelopes measure 162 mm by 229 mm (6.38 inches by 9 inches) and are used for mailing folded A4 size documents. DL envelopes measure 110 mm by 220 mm (4.33 inches by 8.66 inches) and are commonly used for mailing letters, invoices, and other business correspondence.
Card Sizes
Card sizes vary depending on the purpose, but common card sizes include A6 (105 mm by 148 mm), A5 (148 mm by 210 mm), and A4 (210 mm by 297 mm) folded in half. These sizes are commonly used for printing greeting cards, invitations, and business cards.
Ledger Size
Ledger size paper measures 17 inches by 11 inches (432 mm by 279 mm) and is commonly used in accounting and finance for printing spreadsheets and financial reports.
Folio Size
Folio size paper measures 8.5 inches by 13 inches (216 mm by 330 mm) and is commonly used for printing legal documents, such as contracts and agreements. Folio size paper is slightly longer than letter size paper and is sometimes referred to as “foolscap” paper.
Factors Affecting Paper Size
When choosing the right paper size, several factors come into play. These factors include:
Geographic Location
Different countries have different paper size standards. For example, North America uses the Letter and Legal size standards, while Europe uses the A series standard. Understanding the paper size standards in your region is essential for selecting the right paper size for your printing needs.
Industry Standards
Different industries have different paper size requirements. For example, the publishing industry commonly uses the B series of paper sizes, which are larger than the A series and used for printing books and magazines. The architectural industry commonly uses the C series of paper sizes, which are used for designing and printing architectural drawings.
Printer and Copier Capabilities
Printers and copiers have different capabilities when it comes to paper size. Some printers and copiers can handle larger paper sizes, while others are limited to smaller sizes. Understanding the capabilities of your printer or copier is essential for selecting the right paper size and avoiding printing errors.
Conclusion
In conclusion, understanding paper size is essential for selecting the right type of paper for your printing needs. Different paper sizes, such as Letter, Legal, and A4, are commonly used in different regions and industries. Factors such as geographic location, industry standards, and printer and copier capabilities also play a role in selecting the right paper size. By selecting the right paper size, you can avoid printing errors and ensure that your printed documents look professional.