The thickness of Norways Rhomben Porphyry slabs can vary depending on the specific quarry and the intended use. However, typical slab thicknesses for Rhomben Porphyry range from 2 to 3 centimeters (0.8 to 1.2 inches) for interior applications, and 3 to 5 centimeters (1.2 to 2 inches) for exterior use. It is always best to check with the specific supplier or quarry for the available thickness options.