The size of your poster should not exceed 1m by 1m much. This would for instance comprise 12 pages of A4 format.

For those who, instead of traveling with a 1 square meter object, wish to compose their poster only at Magdeburg, assistance
and corresponding materials (such as cardboard paper and adhesives) will be readily available during the whole meeting.

While the contents and layout of your poster may be as formal or informal as you wish, remember that legibility is important.