D4

Belonging to the ISO 216 standard, D4 paper size is a distinctive member of the D series. This series is not as commonly recognized as its A and B counterparts, yet it holds its own unique significance. The dimensions of a D4 sheet are 192mm x 272mm or 7.6 inches x 10.7 inches, making it an ideal choice for specific applications.

The ISO 216 standard, which includes the D series, is based on an aspect ratio of √2:1. This ingenious ratio allows each subsequent paper size in the series to be created by simply halving the preceding one parallel to its shorter sides. Thus, two sheets of D5 will precisely equal one sheet of D4 when placed side by side.

D4 paper dimensions

Specs

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While not as prevalent in everyday use like A4 or Letter sizes from ANSI standards, D4 finds its niche in specialized areas such as bookbinding and stationery production where precision matters immensely.

Interestingly enough, despite being less known than other paper sizes, the mathematical elegance behind the creation of D4 and other ISO sizes has been recognized globally. It's this universal acceptance that led to ISO 216 becoming an international standard - a testament to its practicality and efficiency.

While it may not be your everyday go-to paper size for printing documents or photos at home or office settings; for those who value precision and consistency across different scales - architects, designers or publishers - understanding and utilizing a seemingly obscure size like D4 can make all the difference.

Other Formats in the Chinese Series

Interesting facts about D4

D4 Paper: Weird and Interesting Facts

1. Origin of the D Series: The D series of paper sizes, including D4, was introduced by the International Organization for Standardization (ISO) in 1975 as an extension to the A and B series. It was primarily designed for technical drawings and engineering purposes.

2. Dimensions of D4 Paper: The dimensions of a D4 paper sheet are 340 mm x 490 mm (13.39 in x 19.29 in). It has an area of approximately 0.166 square meters.

3. Aspect Ratio: Like other ISO paper sizes, the aspect ratio of D4 paper is √2 (1:√2), which means that when you fold it in half along its longer side, you get two sheets with the same proportions.

4. Limited Availability: Compared to standard A and B series papers, finding D series papers like D4 can be challenging as they are less commonly used outside specific technical fields.

5. Compatibility with Other Sizes: The dimensions of a folded D3 sheet are equivalent to those of a full-size unfolded D4 sheet, making them compatible for certain applications where scaling or resizing is required.

6. Common Usage: While not widely used in general printing or office settings, the larger size of D-series papers like D3 and above makes them suitable for architectural plans, blueprints, and other technical drawings that require more space.

7. Variations Across Countries: Although ISO sets standards for paper sizes globally, some countries have their own unique variations within the ISO system due to historical reasons or specific requirements.

8. Folding Possibilities: Due to its larger size compared to A-series papers commonly used in offices, D4 paper offers more folding possibilities, allowing for creative and intricate designs in origami or other paper crafts.

9. Niche Applications: D4 paper is often used by artists and designers who require a larger canvas for their artwork or need to create detailed sketches or diagrams.

10. Environmental Impact: Like all paper products, the production of D4 paper has an environmental impact. Opting for recycled or sustainably sourced papers can help reduce the ecological footprint associated with its manufacturing process.