Poster size guide

Poster sizes in general stick to ISO paper standard sizes. Litho and screen printers need to use these standard sizes to print onto a fixed sheet size.

It’s also wise to stick these standards in large format digital print, as although they print onto a roll rather than sheets, most poster frames, billboards, pavement signs etc come in these set sizes.

ISO paper sizes

Format A series B series C series
Size mm × mm mm × mm mm × mm
00 1189 x 1682
0 841 × 1189 1000 × 1414 917 × 1297
1 594 × 841 707 × 1000 648 × 917
2 420 × 594 500 × 707 458 × 648
3 297 × 420 353 × 500 324 × 458
4 210 × 297 250 × 353 229 × 324

 

In the UK we also still use some standard imperial sizes for posters, such as 40″x30″ and 60″x40″.

Imperial paper sizes

Size inch × inch mm × mm
60×40 60 x 40 1016 x 1524
40×30 40 x 30 762 x 1016
30×20 30 x 20 508 x 762

Visual reference

(Click to enlarge)

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