A3 - The small one (29.7 x 59.4 cm)
As big as two A4 sheets. Pretty small. Suitable for an office desk or very small rooms or narrow corridors where you can see the motif up close.
A2 - The small big one (42 x 59.4 cm)
A “small poster.” Often seen posted randomly, e.g., on electrical boxes or construction site barriers.
A1 - The big small one (59.4 x 841 cm)
A real poster. This is no longer small. Good for medium-sized rooms such as living rooms, dining rooms, etc.
F4 - World format (89.5 x 128 cm)
The flagship. Same size as APG street posters, e.g., on streets or on round cultural pillars. For really large rooms, such as lofts or bedrooms, which contain few elements.