The largest standard size of a drawing sheet is A0.
A0 is part of the ISO 216 A series of paper sizes, which are based on a constant ratio between the length and width of √2:1. This means each subsequent size (A1, A2, A3, etc.) is created by halving the longer side of the previous size. Therefore, A0 is the largest in the series.
The dimensions of an A0 sheet are 841 x 1189 millimeters (approximately 33.1 x 46.8 inches). This makes it suitable for large-format drawings, posters, and technical diagrams.
Here's a brief overview of the A-series sizes, showcasing how A0 is the largest:
| Paper Size | Dimensions (mm) | Dimensions (inches) |
|---|---|---|
| A0 | 841 x 1189 | 33.1 x 46.8 |
| A1 | 594 x 841 | 23.4 x 33.1 |
| A2 | 420 x 594 | 16.5 x 23.4 |
| A3 | 297 x 420 | 11.7 x 16.5 |
| A4 | 210 x 297 | 8.3 x 11.7 |
As you can see from the table, the dimensions decrease as you move down the series, confirming that A0 is the largest. While custom-sized drawing sheets may exist, A0 is the largest standard size.
