Rock panels are becoming more and more recognized and loved, and are gradually being sought after by everyone. The common thickness of rock panel is 3mm, 4.5mm, 5.5mm, 6mm, 9mm, 12mm, 15mm, 18mm, 20mm, etc. The thinner the rock panel, the better? There are applicable thicknesses for different application spaces and scenarios. How to choose the thickness of rock panel?