D0

The D0 paper size has dimensions of 764 mm x 1064 mm, making it the largest size in China's unique D series formats. With a surface area of 0.81 square meters, D0 is designed for especially large document needs. It has origins tracing back to the Republic of China era prior to 1949, intended for specialized Chinese requirements not fulfilled by standard ISO sizes.

The long side dimension of 1064 mm allows flexibility for oversized documents or plans. The 4:3 aspect ratio facilitates applications like complex technical drawings and architectural or engineering plans. Its US inch equivalent dimensions are 30 1⁄12 inches by 41 7⁄8 inches. The D0 size is well suited for very wide or long layout needs, offering a standardized solution for large-scale Chinese documents and technical designs.

Overall, the D0 format serves specialized oversize document needs where even standards like the A0 size may be too restrictive. The D series and D0 size demonstrate how Chinese paper standards have been tailored for unique local requirements not served by internationally standardized formats. With its large dimensions, D0 lends utility and standardization for the extra-large paper needs in China.