this 18"x8" Travetine tile was originally 18"18" that was cut for this specific tile layout design. the shower pan and the recessed shampoo niches are 1"x1" mosaic slate stone and the main shower wall have 4"x4" Slate stone laid in a diagonal design with 1" Travertine cut off accent pieces in the corners. All the Travertine 90` angels are buffed to be smooth and rounded and the rubbed oil bronzed plumbing fixtures work great with the Slate stone.