I'm not really understanding the size you refer to...or where it goes? For floor tile....a rectified 12X24 or 18X18...maybe an Ashlar pattern. For walls...6X12 or 3X6 or ??? For counter tops? Depends on your locale. I understand from Norm that they use thicker material in FLA than we do in CA. We typically do built up edges by laminating or miter folding the edge. Where else are you thinking of putting granite?