4.5 x 1.125 x 2.5 in (11.4 x 2.86 x 6.35 cm) Containing thicker fused slabs is a breeze with hard Bricks bracers and mullite/cordierite Dams. Dams feature crisp edges for excellent contact with the kiln shelf. 10 in Dams appropriate for creating work up to 9 x 9 in (22.9 x 22.9 cm); 20 in Dams for work up to 19 x 19 in (48.3 x 48.3 cm). Tolerance on Bricks dimensions is 1/8 in (3 mm).