Thank you for viewing. I bought these a long time ago, but they've been stored unused. This is a set of two. They are 20cm square, but upon close inspection, the sides are not perfectly straight, although this shouldn't pose a significant problem for use. They can be used as trivets, pot holders, etc. There are various ways to use them. I would like to ask that those who understand the above points purchase them. #Trivet #PotHolder #Coaster