> For the complete documentation index, see [llms.txt](https://ms-kb.msd.unimelb.edu.au/print-room/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ms-kb.msd.unimelb.edu.au/print-room/file-preperation/understanding-paper-size.md). # 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 B1](/print-room/printers-services/plotter-3-large-format-printing.md) | A0; A1; A2; Banner | | [Plotter B2](/print-room/printers-services/plotter-4-large-format-printing-2.md) | A0; A1; A2; Banner | | [Plotter C](/print-room/printers-services/plotter-3-large-format-printing.md) | A0; A1; A2; Banner |