HI - Thank you for writing and thank you for y our interest in The Tile Mural Store. The tiles the way they are sold here are wall tiles and should not be installed on the floor. They are not rated for walking/standing on and the tiles would be extremely slippery when wet causing a slip/fall hazard. The tiles would be dangerous installed on a shower floor and we do not recommend using the tiles for a shower floor. I hope I've been helpful in answering your question. Thank you again for your interest in The Tile Mural Store. Toni