Your master bathroom’s surfaces do more than just contribute to the overall look and feel. They also take lots of abuse. Porcelain tiles are a favourite among designers, for use on the floors and walls alike. You can find some versions in the €6 per square foot range that look like natural stone. I would recommend larger size tiles to minimize grout lines, this ensure easier cleaning. This might mean 18-by-18-inch tile on the floors and 12-by-12-inch on some or all of the walls, perhaps transitioning to 6-by-6 tiles on the diagonal with a glass mosaic transition strip.