Rolly Toys Giant Checker Set9. 5" checkers are sized perfectly for any hard surface or fold up mat. Slide them with your feet, or use the six metal poles to help you move the pieces and stack the checkers during play! If you already own the giant chess and mat, you can just add giant checkers! Recommended is the 9' nylon mat (see accessories). Yes any mat with 12" to 18" squares will work great. In fact you can lay your own playing surface of tile, concrete, or just get