The dimensions of the pink paper look just very slightly shorter than either A4 or US Letter. Sure, it could have been trimmed, but why would you go to the effort of trimming such a tiny amount on an otherwise low effort poster?
Seems the pink paper has a backing on it to stiffen it. Left side seems to show the backing, which may be pink cardboard. Given the mounting location, I would expect it to be “floppy” like the “lined” paper without a stiffener.
All of my above to say, I think someone put a “lot” of effort into the pink sign.
The dimensions of the pink paper look just very slightly shorter than either A4 or US Letter. Sure, it could have been trimmed, but why would you go to the effort of trimming such a tiny amount on an otherwise low effort poster?
Seems the pink paper has a backing on it to stiffen it. Left side seems to show the backing, which may be pink cardboard. Given the mounting location, I would expect it to be “floppy” like the “lined” paper without a stiffener.
All of my above to say, I think someone put a “lot” of effort into the pink sign.
The first scrap piece of paper they had laying around.