Set of 4 thin chair mats. They are 34x34cm squares. The back is non-slip, making them easy to use. I used them for about six months and then stored them at home. They have been home-cleaned. They are in relatively good condition, with no noticeable stains, but they have been stored at home for a long time, so please refrain from purchasing if you are sensitive to this. Thank you for looking! Please be sure to read my self-introduction before purchasing.