I have some toploaders I use to protect my maps but I know some folks use plexiglass.
What solution is best? If I go the plexiglass route where do I get a piece big enough to protect a map?
Don't get pieces too big to carry.
I use 18"x24" which fits fine for a 2x2 panel map (like Combat Commander). I use 2 for 4x2 panel map (like 90% of all wargame maps).
These fit in my portfolio to carry all of Combat Commander maps.
I also use with all crayon drawing railroad games using wet erase (i.e. OH projector) markers which don't smudge and come in 8 colors.