Nantucket 2 in. x 20 in. Turquoise Polished Ceramic Wall Tile (20 pieces / 5.38 sq. ft. / case) Internet #312138472 Model #EXT3RD101912 The product specification states that it is safe for showers, however non-vitreous tiles are NOT safe for shower. I purchased the tiles based on product specifications which states the following: Location - "shower", Water Protection - "Water Resistant'. The product overview states "Non-Vitreous flooring has water absorption of more than 7% for indoor use". Appaloosa Arabesque Carribean Blue 8 in. x 10 in. Polished Porcelain Floor & Wall Tile (18 Pieces, 10.54 sq. ft. / box) Internet #308146538 Model #EXT3RD101647 Product Overview states that this is a non-vitreous and impervious tile. YOU CANNOT HAVE A TILE BE BOTH, IT CAN ONLY BE ONE OR THE OTHER! IF YOU PURCHASED TILE FROM HOME DEPOT AND YOUR TILE IS WARPING.