PA0

The PA0 paper size has dimensions of 840mm x 1120mm, giving it a total surface area of 0.9424 square meters. It is the largest format in the PA transitional paper size system, which was proposed as an addition to the ISO standard formats in 1975 but ultimately rejected. Despite the fact that PA0 is a non-standard format, it has found utility for some niche applications due to its large surface area. PA0, along with the rest of the PA series, has an aspect ratio of 1:√2, making these formats well suited for efficient scaling. While the PA0 size may not have any common alternative names, its extremely large dimensions lend well to uses such as presentation posters, oversized brochures, and architectural drawings, where the goal is to showcase content at an impressive scale. Because PA0 was conceived along with the rest of the PA Series as a helpful extension of the ISO system rather than an integral component, it lacks much compelling backstory of its own but nonetheless serves its role in providing an extra large transitional format when the standardized sizes fall short. With careful consideration of how to leverage its strengths like broad surface area and efficient scalability, PA0 can be a powerful tool for making an impression when standard sizes won't suffice.