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US Series



Imperial paper size, a term often synonymous with the traditional British paper standard, holds a unique position in the world of print and design. Unlike its ISO or ANSI counterparts, Imperial sizes are not part of any standardized series. Instead, they have evolved organically over centuries of use.

The dimensions of Imperial paper size are typically measured in inches rather than millimeters, reflecting its roots in the British Imperial system. The most common sizes include Foolscap at 8 x 13 inches and Quarto at 10 x 8 inches. These sizes have been widely used across various industries for different purposes such as legal documents or book printing.

Imperial 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

Interestingly, despite the global shift towards metric measurements and standardized ISO paper sizes like A4 or A3, the Imperial system continues to hold sway in certain sectors and regions. This is particularly true within the United States where 'Letter' size (8.5 x 11 inches) - an offshoot of the Imperial system - remains dominant.

In conclusion, while it may not conform to modern international standards like ISO or ANSI series', the Imperial paper size carries with it a rich history and continues to be relevant today due to its widespread usage across various industries.

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Interesting facts about Imperial

1: The Origin of Imperial Paper

Imperial paper, also known as Imperial size, was first introduced in England in the 19th century. It was primarily used for official documents and royal proclamations.

2: The Royal Connection

The name "Imperial" comes from its association with the British Royal Family. It was believed that Queen Victoria herself preferred this paper size for her personal correspondence.

3: Unique Dimensions

Imperial paper measures approximately 22 x 30 inches (559 x 762 mm). Its distinctive dimensions make it larger than standard letter-sized or A4 paper commonly used today.

4: Popular for Fine Art Prints

In the world of fine art printing, Imperial paper is highly sought after due to its large size and excellent quality. Artists often use it to create stunning prints and reproductions.

5: Limited Availability

Due to its rarity and specialized use, finding Imperial-sized paper can be quite challenging. Only a few specialty stationery stores or online suppliers may carry it.

6: Preferred by Calligraphers

The generous dimensions of Imperial paper make it a favorite among calligraphers who appreciate the ample space it provides for their intricate lettering and designs.

7: Historical Significance

In the past, important legal documents such as land deeds were often written on Imperial-sized parchment or vellum. This tradition added an air of significance to such papers.

8: International Variations

The dimensions of Imperial-sized paper can vary slightly between countries. For example, in the United States, it is commonly referred to as "US Imperial" and measures 22 x 30.5 inches (559 x 775 mm).

9: A Legacy of British Influence

Imperial paper size was widely used in countries that were once part of the British Empire, including Canada, Australia, and India. Its influence can still be seen in some official documents.

10: Niche Use in Modern Times

While Imperial paper has largely been replaced by standard letter sizes and metric-based measurements, it continues to hold a special place among enthusiasts who appreciate its historical significance and unique dimensions.