Available Sizes;2 cm.Slabs 1.0x30.5x30.5 cm.3 cm.Slabs 1.2x30.5x61 cm.30x60x2 cm. 1.2x40.6x61 cm.40x60x2 cm. 1.2x61x61 cm.60x60x2 cm. 1.2x61x122 cm.60x120x2 cm.StairsRisers