This set contains a multitude of different sized and shaped tiles which can be arranged in any configuration to make an infinite number of dungeons for your Tabletop roleplaying games. Each square is "oversized" 1" (measures 27.6mm) to help with placement of minis, with engraved tiles which can be used out of the box or painted.This set is made from 3mm thick laser cut (and engraved) MDF