# Understanding Paper Size

## Why we use these sizes

Paper size standards govern the size of sheets of paper used as writing paper, stationery, cards, and for some printed documents. The **ISO** 216 **paper size** system is an international standard that is used in many places in the world in copy and print devices that defines **paper sizes**. Based on the metric system, the **ISO paper size** system uses a height-to-width ratio with an aspect ratio of 1 to 1.414 (The square root of 2).  

![](/files/-M5_ev_o0pfgWQC68c3s)

Table of Paper Sizes From A0 to A4

| Size | Width x Height (mm) | Width x Height (in) |
| ---- | ------------------- | ------------------- |
| A0   | 841 x 1189 mm       | 33.1 x 46.8 in      |
| A1   | 594 x 841 mm        | 23.4 x 33.1 in      |
| A2   | 420 x 594 mm        | 16.5 x 23.4 in      |
| A3   | 297 x 420 mm        | 11.7 x 16.5 in      |
| A4   | 210 x 297 mm        | 8.3 x 11.7 in       |

## Limitations of the media size in the printers

| Printer                                                                       | Available paper size |
| ----------------------------------------------------------------------------- | -------------------- |
| [MSD 1 and 2](/print-room/printers-services/mfd-print-scan-and-copy.md)       | A4; A3               |
| [Plotter A](/print-room/printers-services/plotter-4-large-format-printing.md) | A0; A1; A2; Banner   |
| [Plotter B](/print-room/printers-services/plotter-3-large-format-printing.md) | A0; A1; A2; Banner   |
| [Plotter C](/print-room/printers-services/plotter-3-large-format-printing.md) | A0; A1; A2; Banner   |


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