US Paper Sizes
In North America, including the United States, Canada, and parts of Mexico, there is a unique deviation from the global norm in paper sizing. Unlike most of the first world which adheres to the ISO 216 standard for paper sizes, these regions utilize a distinct set of sizes including Letter, Legal, Executive, and Ledger/Tabloid. These sizes have been formalized under the ASME Y14.1 standard, which delineates Drawing Sheet Size & Format.
Additionally, the American National Standards Institute (ANSI) incorporates the ISO 216 standard within its own metric system under ASME Y14.1M – Metric Drawing Sheet Size & Format. This integration shows a blend of international and local standards, catering to a wide range of uses from everyday office supplies to professional engineering drawings.
Furthermore, envelope sizes in the US also do not conform to the ISO 216 standard. They are distinct in their dimensions and are specifically listed to cater to the domestic requirements. This non-conformity extends across various aspects of stationery and document handling, indicating a tailored approach to paper sizing that aligns with North American preferences and practices.
The table below provides the dimensions in both millimeters and inches for the most commonly used American paper sizes, offering a clear and concise reference for those needing to navigate the complexities of paper standards in North America. This comprehensive detailing not only assists in understanding the variances in paper size but also aids in selecting the appropriate dimensions for specific purposes, whether it be for printing, legal documentation, or design drafting.
| US Paper Size | Millimeters (mm) | Inches (Inches) | Centimeters (cm) | Meters (m) | Yards (Yards) | Aspect Ratio |
|---|---|---|---|---|---|---|
| Letter | 216 x 279 | 8.50 x 11.00 | 21.6 x 27.9 | 0.216 x 0.279 | 0.2361 x 0.3056 | 1:1.5455 |
| Legal | 216 x 356 | 8.50 x 14.00 | 21.6 x 35.6 | 0.216 x 0.356 | 0.2361 x 0.3889 | 1:1.25 |
| Ledger/Tabloid | 279 x 432 | 11.00 x 17.00 | 27.9 x 43.2 | 0.279 x 0.432 | 0.3056 x 0.4722 | 1:1.2941 |
| Half Letter | 140 x 216 | 5.50 x 8.50 | 14.0 x 21.6 | 0.140 x 0.216 | 0.1528 x 0.2361 | 1:1.6000 |
| Government Letter | 203 x 267 | 8.00 x 10.50 | 20.3 x 26.7 | 0.203 x 0.267 | 0.2222 x 0.2917 | 1:1.5294 |
| Junior Legal | 127 x 203 | 5.00 x 8.00 | 12.7 x 20.3 | 0.127 x 0.203 | 0.1389 x 0.2222 | 1:1.6471 |
| Government Legal | 216 x 330 | 8.50 x 13.00 | 21.6 x 33.0 | 0.216 x 0.330 | 0.2361 x 0.3611 | 1:1.5455 |
ANSI Standard Paper Sizes
The ANSI (American National Standards Institute) established a unique series of paper sizes, centered around the Letter (8.5″ x 11″) format, marking it as the ‘A’ size. This framework was expanded to include larger sizes designated as B, C, D, and E. Interestingly, these ANSI standard sizes were defined in 1992, which is notably later than the establishment of the ISO standard sizes. The Letter format itself has a long history, having been originally standardized in 1921 and later formally adopted by the U.S. government in the 1980s. The ANSI A size is commonly known as Letter, while the ANSI B size is often referred to as Ledger or Tabloid.
This system of paper sizes developed by ANSI contrasts with the ISO standard sizes, which maintain a consistent aspect ratio of 1:√2. The ANSI standards, however, introduce two different aspect ratios: 1:1.2941 and 1:1.5455. These variations mean that scaling documents up or down between these sizes isn’t as straightforward as with ISO sizes. When documents are resized from one ANSI format to another, the resulting margins are often wider, which can affect the aesthetic and functional aspects of printed materials.
The introduction of these specific aspect ratios by ANSI was motivated by practical usage patterns and the needs of American industries and government. Unlike the ISO sizes, which were designed to seamlessly scale between sizes, the ANSI sizes provide a tailored approach that accommodates a variety of specific uses, such as legal documents, technical drawings, and publications. This distinction highlights a significant divergence in paper sizing standards, reflecting different regional needs and historical developments.
Moreover, the adoption of the Letter size as a de facto standard in the U.S. has influenced not only the domestic market but also international business practices, where U.S. letter size is often recognized and used. Despite the global prevalence of ISO sizes, the persistence of ANSI sizes demonstrates the complexity and diversity of standardization in material and document handling across different regions. This coexistence of standards necessitates flexibility and adaptability in international communication and documentation practices.
| Paper Size | Millimeters (mm) | Inches (Inches) | Centimeters (cm) | Meters (m) | Yards (Yards) | Aspect Ratio | Closest ISO |
|---|---|---|---|---|---|---|---|
| ANSI A | 216 x 279 | 8.50 x 11.00 | 21.6 x 27.9 | 0.216 x 0.279 | 0.2361 x 0.3056 | 1:1.2941 | A4 |
| ANSI B | 279 x 432 | 11.00 x 17.00 | 27.9 x 43.2 | 0.279 x 0.432 | 0.3056 x 0.4722 | 1:1.5455 | A3 |
| ANSI C | 432 x 559 | 17.00 x 22.00 | 43.2 x 55.9 | 0.432 x 0.559 | 0.4722 x 0.6111 | 1:1.2941 | A2 |
| ANSI D | 559 x 864 | 22.00 x 34.00 | 55.9 x 86.4 | 0.559 x 0.864 | 0.6111 x 0.9444 | 1:1.5455 | A1 |
| ANSI E | 864 x 1118 | 34.00 x 44.00 | 86.4 x 111.8 | 0.864 x 1.118 | 0.9444 x 1.2222 | 1:1.2941 | A0 |
| ANSI B+ | 305 x 487 | 12.00 x 19.17 | 30.5 x 48.7 | 0.305 x 0.487 | 0.3333 x 0.5325 |
Catalog Envelope Sizes
Catalog envelopes are specifically engineered to accommodate catalogs, brochures, and other heavier or bulkier contents. One of the key features that set these envelopes apart is the center seam, which significantly enhances their durability. This design choice ensures that the envelopes can handle the added weight and bulk of their contents without tearing or deteriorating during transit.
The aspect ratio for catalog envelopes typically ranges between 1:1.3 and 1:1.5. This range closely mirrors the ratios found in announcement envelopes, indicating a shape that is somewhat closer to square than rectangular. However, unlike announcement envelopes, which are often used for personal correspondence, catalog envelopes are designed with a more utilitarian purpose in mind. Their robust construction is crucial for business and marketing communications, where the safe delivery of promotional materials can influence customer engagement and sales.
Catalog envelopes are invaluable for businesses that need to send out substantial printed materials. Their sturdy build allows companies to ensure that their catalogs and brochures arrive in pristine condition, presenting a professional image to recipients. Moreover, the slightly squarer shape provides ample space for contents that might be too bulky for standard envelopes, while still maintaining an aesthetically pleasing proportion.
In essence, catalog envelopes are an essential tool for any organization that relies on direct mail for distribution of marketing and informational materials. Their design reflects a blend of functionality and durability, crucial for protecting contents during shipping and handling, while also accommodating the practical needs of businesses in diverse industries.
| Size | Millimeters (mm) | Inches (Inches) | Centimeters (cm) | Meters (m) | Yard (yards) |
|---|---|---|---|---|---|
| 1 | 228.6 x 152.4 | 9.00 x 6.00 | 22.86 x 15.24 | 0.2286 x 0.1524 | 0.25 x 0.167 |
| 1¾ | 241.3 x 165.1 | 9.50 x 6.50 | 24.13 x 16.51 | 0.2413 x 0.1651 | 0.264 x 0.181 |
| 3 | 254.0 x 177.8 | 10.00 x 7.00 | 25.40 x 17.78 | 0.2540 x 0.1778 | 0.278 x 0.194 |
| 6 | 1266.7 x 190.5 | 49.87 x 7.50 | 126.67 x 19.05 | 1.2667 x 0.1905 | 1.385 x 0.208 |
| 8 | 285.8 x 209.6 | 11.25 x 8.25 | 28.58 x 20.96 | 0.2858 x 0.2096 | 0.313 x 0.229 |
| 9¾ | 285.8 x 222.3 | 11.25 x 8.75 | 28.58 x 22.23 | 0.2858 x 0.2223 | 0.313 x 0.243 |
| 10½ | 304.8 x 228.6 | 12.00 x 9.00 | 30.48 x 22.86 | 0.3048 x 0.2286 | 0.333 x 0.250 |
| 12½ | 317.5 x 241.3 | 12.50 x 9.50 | 31.75 x 24.13 | 0.3175 x 0.2413 | 0.347 x 0.264 |
| 13½ | 330.2 x 254.0 | 13.00 x 10.00 | 33.02 x 25.40 | 0.3302 x 0.2540 | 0.361 x 0.278 |
| 14½ | 368.3 x 292.1 | 14.50 x 11.50 | 36.83 x 29.21 | 0.3683 x 0.2921 | 0.403 x 0.319 |
| 15 | 381.0 x 254.0 | 15.00 x 10.00 | 38.10 x 25.40 | 0.3810 x 0.2540 | 0.417 x 0.278 |
| 15½ | 393.7 x 304.8 | 15.50 x 12.00 | 39.37 x 30.48 | 0.3937 x 0.3048 | 0.431 x 0.333 |
Architectural Paper Sizes
North America features a distinct series of paper sizes specifically tailored for architectural use. Generally, these sizes are designed with aspect ratios of 4:3 or 3:2, closely mirroring the aspect ratios commonly used for computer screens. This similarity aids in the visual consistency between digital and printed formats, which is particularly beneficial for architects and designers who frequently switch between viewing digital plans and printed documents.
The standardized architectural paper sizes, often referred to as the Arch series, include a variety of dimensions. However, there are references to sizes such as Arch E2, measuring 26.0 x 38.0 inches (660 x 965 mm), and Arch E3, measuring 27.0 x 39.0 inches (686 x 991 mm) on some internet sites. Despite these listings, it appears that there are no official references to these sizes on the ANSI website, which officially lists sizes A through E and E1. This absence suggests that Arch E2 and Arch E3 may not be standardized under ANSI.
Moreover, the aspect ratios for Arch E2 and Arch E3 do not align with the simple ratios typical of the Arch series, adding to the ambiguity regarding their standardization. Despite this, it’s noted that Arch E3 is available for purchase from some paper suppliers under the simplified moniker of “27 x 39”. On the other hand, Arch E2 seems to be less accessible, if available at all, which may indicate its limited use or demand within the architectural community.
This situation highlights the complexities and variations within paper sizing standards, especially in fields that require precise specifications such as architecture. While some sizes become standard due to widespread use and acceptance, others may remain obscure or unofficial, reflecting the dynamic nature of design and construction needs. The availability of specific paper sizes can significantly impact the ease of presenting and communicating architectural designs effectively, emphasizing the importance of standardization in facilitating professional practices.
| Paper Size | Millimeters (mm) | Inches (Inches) | Centimeters (cm) | Meters (m) | Yards (Yards) | Aspect Ratio |
|---|---|---|---|---|---|---|
| ARCH A | 229 x 305 | 9.00 x 12.00 | 22.9 x 30.5 | 0.229 x 0.305 | 0.2500 x 0.3333 | 4:3 |
| ARCH B | 305 x 457 | 12.00 x 18.00 | 30.5 x 45.7 | 0.305 x 0.457 | 0.3333 x 0.5000 | 3:2 |
| ARCH C | 457 x 610 | 18.00 x 24.00 | 45.7 x 61.0 | 0.457 x 0.610 | 0.5000 x 0.6667 | 4:3 |
| ARCH D | 610 x 914 | 24.00 x 36.00 | 61.0 x 91.4 | 0.610 x 0.914 | 0.6667 x 1.0000 | 3:2 |
| ARCH E | 914 x 1219 | 36.00 x 48.00 | 91.4 x 121.9 | 0.914 x 1.219 | 1.0000 x 1.3333 | 4:3 |
| ARCH E1 | 762 x 1067 | 30.00 x 42.00 | 76.2 x 106.7 | 0.762 x 1.067 | 0.8333 x 1.1667 | 7:5 |
