Cornerstone Building Brands’ ClipStone ProPanel is a panelized mortarless stone veneer with two large-format panel sizes: 20 inches by 7 1/4 inches and 12 inches by 7 1/4 inches. Requiring no special tools to install, the panels mechanically fasten to walls with mounting clips that create space for drainage, promoting drying in exterior applications. We found a box (a mix of the two panel sizes covering 5 1/4 square feet) of Mystic Northern Ledge for about $125 online.