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US Series



Belonging to the ANSI series, ANSI C stands as a unique paper size that holds its own significance in the realm of standardized paper dimensions. This particular size is part of the American National Standards Institute (ANSI) series, a set of standards that are widely recognized and utilized across various industries in the United States.

ANSI C measures 17 x 22 inches or 432 x 559 mm. This specific dimension makes it twice as large as ANSI B and half the size of ANSI D, demonstrating a logical progression within the series. The design rationale behind this sizing is to facilitate easy scaling between different sizes without distortion or loss of content.

ANSI C paper dimensions


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2A046.81 x 66.221189 x 1682119 x 1683370 x 4768
A120.51 x 0.7113 x 181 x 237 x 51
4A066.22 x 93.621682 x 2378168 x 2384768 x 6741
A110.71 x 1.0218 x 262 x 351 x 74
A101.02 x 1.4626 x 373 x 474 x 105
A3+12.95 x 19.02329 x 48333 x 48933 x 1369
A1+23.98 x 35.98609 x 91461 x 911726 x 2591
A0+35.98 x 50.87914 x 129291 x 1292591 x 3662
A64.13 x 5.83105 x 14811 x 15298 x 420
A55.83 x 8.27148 x 21015 x 21420 x 595
A48.27 x 11.69210 x 29721 x 30595 x 842
A311.69 x 16.54297 x 42030 x 42842 x 1191
A91.46 x 2.0537 x 524 x 5105 x 147
A216.54 x 23.39420 x 59442 x 591191 x 1684
A82.05 x 2.9152 x 745 x 7147 x 210
A123.39 x 33.11594 x 84159 x 841684 x 2384
A72.91 x 4.1374 x 1057 x 11210 x 298
A033.11 x 46.81841 x 118984 x 1192384 x 3370

The versatility of ANSI C cannot be overstated. It finds extensive use in applications ranging from architectural drawings to graphic design, making it an indispensable tool for professionals in these fields. Its ample space allows for detailed illustrations and comprehensive layouts, providing clarity and precision that smaller sizes may not offer.

Interestingly, despite its American origin, ANSI C has gained global acceptance due to its practicality and adaptability. It's worth noting that while ISO A series remains more prevalent internationally, many global organizations have adopted ANSI standards including ANSI C for their internal operations.

Whether you're drafting an intricate blueprint or designing an elaborate poster, choosing ANSI C can make all the difference in your final output. Its strategic dimensions combined with widespread recognition make it a reliable choice for professionals seeking quality and consistency in their work.

Other Formats in the US Series

Interesting facts about ANSI C

1: ANSI C paper is commonly known as Letter size

ANSI C paper, also referred to as Letter size, measures 8.5 inches by 11 inches (215.9 mm by 279.4 mm). It is the most widely used paper size in North America and is commonly used for various purposes such as printing documents, letters, and business correspondence.

2: ANSI C paper has a rich history

The ANSI C paper size was adopted in the United States in the early 20th century. It was standardized by the American National Standards Institute (ANSI) to provide a consistent and practical paper size for everyday use.

3: ANSI C is part of the ANSI/ASME Y14 series

The ANSI/ASME Y14 series of standards includes various engineering drawing sizes, with ANSI C being one of them. These standards are widely used in engineering and technical fields for creating drawings and blueprints.

4: The aspect ratio of ANSI C paper is approximately √2

The aspect ratio of ANSI C paper is approximately √2 (1:√2), which means that when you cut it in half along its longer side, you get two sheets with the same proportions as the original sheet.

5: The ISO equivalent of ANSI C is A3

In ISO (International Organization for Standardization) paper sizes, which are widely used outside North America, the closest equivalent to ANSI C or Letter size is A3. However, there are slight differences in dimensions between these two standards.

6: The popularity of digital communication affects demand for ANSI C paper

With the rise of digital communication and paperless offices, the demand for ANSI C paper has slightly decreased over the years. However, it remains widely used due to its compatibility with standard printers and copiers.

7: ANSI C paper is compatible with other common sizes

One of the advantages of ANSI C paper is its compatibility with other common paper sizes. For example, two ANSI C sheets placed side by side create an ANSI B sheet, while two ANSI C sheets stacked on top of each other form an ANSI D sheet.

8: The weight and thickness of ANSI C paper can vary

The weight and thickness (measured in pounds or grams per square meter) of ANSI C paper can vary depending on its intended use. It is available in various weights, ranging from lightweight for everyday printing to heavier cardstock for business cards or invitations.

9: ANSI C is not a commonly used size outside North America

While widely used in North America, particularly in the United States, ANSI C or Letter size is not as commonly used internationally. Most countries outside North America follow ISO standards for their paper sizes.

10: The name "Letter" comes from its historical use

The name "Letter" for this size originates from its historical use as a standard size for writing letters. It became popular due to its practicality and ease of handling when folded into envelopes.