These are Nitori unit tatami mats. They are a combination of the items shown in the attached content. Purchased 5-6 years ago and used for several years, they have been stored unused since then. As they are made of rush grass (igusa), there are signs of wear on the corners, and some of the grass strands may be coming loose. However, as I cannot check everything, please understand this before purchasing. - Material: Rush grass (igusa) - Size: Approximately 55cm x 55cm - Thickness: Approximately 1cm - Backing material: Felt Thank you for looking.