Hi, This is actually a porcelain tile that is designed to look like Travertine, it comes in huge slabs, we used ones 3metres x 1.5metres for some of this space - but as its porcelain it is only 6mm thick. As a porcelain it has a lot of advantages over a natural stone in terms of maintenance which was why it was the right choice on this project. I'm not sure where you're based but in the London area I would suggest contacting places like Stone Age and Domus Tiles. Hope that helps, Best wishes, Clare