You could also cut them into pieces to duplicate the holograms. They would obviously be smaller. A cut hologram includes the whole hologram, just from the perspective of that part of the cut piece.
Glass plates likely wouldn't be the best choice for this.
Film sheets might be doable.
https://www.geola.com/product/pfg-01-film/ for a Lithuanian distributor. 35cm (about 1 foot) isn't that large. Might be able to cut it into 4ths (classic 4"x5") ... 2"x3" is a small size (12 per sheet).
Glass plates likely wouldn't be the best choice for this.
Film sheets might be doable.
https://www.geola.com/product/pfg-01-film/ for a Lithuanian distributor. 35cm (about 1 foot) isn't that large. Might be able to cut it into 4ths (classic 4"x5") ... 2"x3" is a small size (12 per sheet).