D2

The D2 paper size defined in China's distinctive D series formats stands at 380 mm x 528 mm. With a total surface area of 0.20 square meters, it falls between D1 and smaller sizes in terms of expansive space. The D2 dimensions originate from historic Republic of China standardization to meet localized requirements.

At 14 23⁄24 inches wide by 20 19⁄24 inches long, the D2 size lends utility for large tabular data presentations that exceed more common A3/B4 sizes. Examples include extensive financial statements, big data tables, multi-page scientific reports, and educational posters where the width provides ample room for columns/content. The aspect ratio also suits binding final documents on the long edge.

In summary, China's one-of-a-kind D series and transitional D2 size fill a customized niche not addressed by ISO standards. The considerably wide D2 format offers standardized specifications for large-spanning sheets where A3/B4 may be inadequate, while maintaining easier handling than the very big D0 and D1 sizes. As with other D sizes, it demonstrates adaption to distinctive Chinese use cases.