Poster size should match the viewing distance and display location. Prioritise legibility, contrast and a clear call to action over packing every detail into the layout.
A4 and A3 posters
A4 is useful for windows and compact noticeboards. A3 gives a stronger presence in campaign offices, community spaces and larger windows.
Keep copy readable
Use a hierarchy that can be understood quickly: candidate or campaign name, key message, contact detail and an appropriate imprint. Review the final artwork at its intended print size.