RAW Series
A1U
Belonging to the ISO 216 international paper size standard, A1U is a unique and versatile paper size. This standard, established by the International Organization for Standardization (ISO), ensures consistency in paper sizes worldwide. The 'U' in A1U denotes 'Untrimmed', indicating that this particular size includes extra margin for print bleed - an essential feature for professional printing processes.
A1U measures 625 x 880 millimeters or approximately 24.6 x 34.6 inches, providing ample space for various applications such as architectural drawings, posters, or large-scale presentations. Its dimensions are derived from the A0 size (the base model of the ISO series) which has an area of one square meter.
A1U paper dimensions
Specs
| Format | in | mm | cm | pt |
|---|---|---|---|---|
| 2A0 | 46.81 x 66.22 | 1189 x 1682 | 119 x 168 | 3370 x 4768 |
| A12 | 0.51 x 0.71 | 13 x 18 | 1 x 2 | 37 x 51 |
| 4A0 | 66.22 x 93.62 | 1682 x 2378 | 168 x 238 | 4768 x 6741 |
| A11 | 0.71 x 1.02 | 18 x 26 | 2 x 3 | 51 x 74 |
| A10 | 1.02 x 1.46 | 26 x 37 | 3 x 4 | 74 x 105 |
| A3+ | 12.95 x 19.02 | 329 x 483 | 33 x 48 | 933 x 1369 |
| A1+ | 23.98 x 35.98 | 609 x 914 | 61 x 91 | 1726 x 2591 |
| A0+ | 35.98 x 50.87 | 914 x 1292 | 91 x 129 | 2591 x 3662 |
| A6 | 4.13 x 5.83 | 105 x 148 | 11 x 15 | 298 x 420 |
| A5 | 5.83 x 8.27 | 148 x 210 | 15 x 21 | 420 x 595 |
| A4 | 8.27 x 11.69 | 210 x 297 | 21 x 30 | 595 x 842 |
| A3 | 11.69 x 16.54 | 297 x 420 | 30 x 42 | 842 x 1191 |
| A9 | 1.46 x 2.05 | 37 x 52 | 4 x 5 | 105 x 147 |
| A2 | 16.54 x 23.39 | 420 x 594 | 42 x 59 | 1191 x 1684 |
| A8 | 2.05 x 2.91 | 52 x 74 | 5 x 7 | 147 x 210 |
| A1 | 23.39 x 33.11 | 594 x 841 | 59 x 84 | 1684 x 2384 |
| A7 | 2.91 x 4.13 | 74 x 105 | 7 x 11 | 210 x 298 |
| A0 | 33.11 x 46.81 | 841 x 1189 | 84 x 119 | 2384 x 3370 |
One intriguing aspect of the A1U and indeed all ISO paper sizes is their aspect ratio - a consistent ratio of width to height that remains constant even when the paper is folded or cut in half. This ratio is approximately equal to √2:1, a characteristic that allows seamless scaling between different sizes within the series.
The ANSI series from North America offers similar functionality but uses a different set of dimensions and ratios. However, it's worth noting that despite these differences, there's often close equivalence between certain ISO and ANSI sizes - making them interchangeable in many scenarios.
A1U stands out as an untrimmed variant within the ISO series offering additional margin space for professional printing needs while maintaining consistency with other sizes through its unique √2:1 aspect ratio.
Other Formats in the RAW Series
Interesting facts about A1U
1: A1U paper is part of the ISO 216 standard
A1U paper belongs to the ISO 216 standard, which was first introduced in 1975. This international standard defines the sizes and dimensions of paper used globally.
2: A1U paper measures approximately 841 x 594 millimeters
The dimensions of A1U paper are approximately 841 x 594 millimeters or about 33.11 x 23.39 inches. It has an aspect ratio of √2:1, meaning that if you fold it in half along its longer side, you get two sheets with the same proportions.
3: A1U is commonly used for architectural and engineering drawings
A1U paper is often preferred by architects and engineers for creating detailed drawings and plans due to its large size. Its ample space allows for precise scaling and accurate representation of designs.
4: The "A" series papers originated from Germany
The "A" series papers, including A1U, were first standardized in Germany during the early twentieth century. The goal was to create a consistent system that would simplify printing processes across different countries.
5: The ISO "A" series follows a specific ratio
All papers within the ISO "A" series maintain a consistent aspect ratio of √2:1. This means that when you divide the longer side by the shorter side, you always get approximately 1.414 (the square root of two).
6: A1U is larger than both Letter and Legal sizes
American Letter size measures about (8.5 x11 inches) and Legal size measures approximately (8.5 x 14 inches). In comparison, A1U paper is significantly larger, making it more suitable for large-scale drawings and designs.
7: A1U paper is part of a series that includes various sizes
The ISO "A" series consists of several sizes, ranging from A0 (the largest) to A10 (the smallest). Each subsequent size is obtained by halving the previous one along its longer side while maintaining the same aspect ratio.
8: The "U" in A1U stands for unfolded
The letter "U" in A1U denotes that the paper is intended to be used in an unfolded state. This distinguishes it from other variations like "F" (for folded) or "SRA" (for trimmed formats).
9: The ISO standard promotes efficient use of resources
The ISO 216 standard was designed to minimize waste and maximize efficiency when cutting paper from larger sheets. By using a consistent aspect ratio, it allows for easy scaling and reduces leftover scraps during production.
10: The ISO standard has been adopted by most countries worldwide
Virtually all countries have adopted the ISO 216 standard for their paper sizes. This global acceptance ensures compatibility between different printing systems and facilitates international document exchange without the need for resizing or reformatting.
