My MN permit to carry card is plastic.MN is paper. My daughter is an elementary teacher with a little machine that laminates.
Works good.
Credit card size plastic in our state.
I've got a paper permit and 2 supplemental sheets with additional handguns on it. My county has recently gone to a plastic "permit" sheet and still uses paper supplemental sheets as needed. I haven't switched. but probably should as mine is pretty well worn.