Sample Size 4" x 4" Mother of Pearl White 1" x 1" Squares for Backsplash and Bathroom Walls and Floors Genuine, first- quality natural shell tile for wall and floor use Polished Finish For Residential and Commercial Use 4" x 4" Sample. Link to purchase 12" x 12" tile: http://www.amazon.com/gp/product/B006YIG48O Thickness: 2 mm