I think porcelain tiles are just normal tiles. They seem like it. We have these left over from our project. Bad miscalculation. 5 boxes plus 5 tiles. The tiles are 12”x24”. They are grey with a bit of white swirl. There are 45 tiles which is 90 square feet. Each box was about $90 so tax included this is about $600. Selling for an 80% reduction. $120