The original map was about the size of two sheets of paper. The squares were tiny — just about the size of Heritage models’ bases, maybe 1/2 inch. My first project scaling it up to 1″ squares so I can fit my figures on it comfortably — mine are mostly based on 1″ bases.
It’s not easy to tell but I tinted each room and hall a little differently so it is clear where they meet. Monsters can’t leave the room or hall they appear in, so it is important!
This is drawn on a sheet of foam-core.