Dark Green Onyx Baseboard Molding 5 x 12 Base Board Molding Made from Dark Green Onyx Size: 5" x 12", Cover 1 linear foot Thickness at top: 3/8", Thickness at Bottom: 3/4" We carry Matching 12x12 tiles, 1x1, 1x2, 2x4, 3x6, Diamond, Octagon Mosaic in White Onyx