Measure the poster; saw the 4 wooden strips to the width of the poster; then sand down the edges.
The length of the poster rails and the size and number of magnets depend on the size of the poster.
Glue two self-adhesive magnets 18x1 mm with a distance of 5 cm from the edge on the right and left side of a rail; press on firmly.
Place two counter magnets on the glued on magnets, remove protective foil from the adhesive and firmly press the second rail onto it.
For the bottom poster rail, repeat steps 2 and 3.
Cut the cord (leather band) to the size of the poster rail; make a knot on both ends.
Glue the silicone discs onto the counter magnets as non-skid coating.
Now you can stick the poster and the cord between the two top poster rails.
Then you can attach the second set of rails to the bottom edge of the poster.
Now you only need to find the right place to hang up.