On the questions The largest tile was 320cm x 160cm. To my knowledge, also the largest currently available. The tile at the washbasin is pretty much exactly 240cm x 120cm. Regarding installation: it is basically the same as with smaller ones, you just have to be two people. The problem is cutting. However, I have the professional opportunity to design CAD models myself. Then it is relatively easy: take measurements, create a model, find someone who can do waterjet cutting, done. What I didn’t dare to tackle is our half-turned staircase to the basement. Here I also wanted no joints. I searched for tiles available in 150cm x 75cm and then had each step cut out in one piece. I can also upload a picture of this.