The thickness of New Zealands Kokonga Basalt slabs can vary depending on where they are sourced and how they are quarried. However, typically, these slabs are available in thicknesses ranging from 2 cm (0.8 inches) to 5 cm (2 inches) or more. It is important to note that these measurements are approximate and can vary. It is recommended to contact specific suppliers or manufacturers for accurate information on the thickness of their Kokonga Basalt slabs.