... 20MM,20-25MM according to your requirementsSurface:Natural split ,Honed , machine-cut , bush-hammered ,Mushroom ,Axe-cut ,calibrated , sawn ... ,tiles ,Skirtings ,Window sills ,Steps &Riser stairs ,Paving stone .Cubes .Mosaic &Borders .Sculptures and MonumentsDecorative effect :High and ... elegant ,so it is a ideal kind of modern decoratiive stone .Quality Control:Thickness tolerance for tile :+/0.5mm; ...