Icewind Dale Encounter Map Set - (2x 20'x30'): - Rules of Play says:
Icewind Dale Encounter Map Set contains two high-quality single-sided vinyl surfaces that are ideal battle grids for staging encounters. The mats may be marked with WET-ERASE markers to temporarily alter terrain areas or make other notes about battlefield conditions during play. Both Encounter Maps measure 20” x 30” and are marked with a 1” grid.