Carrara Marble Italian White Bianco Carrera Flower Mosaic Border Tile Polished (Black) Carrara Marble Italian White Bianco Carrera Flower Mosaic Border Tile Polished. Sheet Size: 4 " (W) X 12" (L) X 3/8" (Thickness) Surface Finish: POLISHED (Flawless, smooth satin finish) Material in stock and ready to ship right away.