Number of pieces: 4 Color: Green Material: Rush grass (igusa) Brand: Ooshimaya Shape: Round (approx. 16cm diameter) Original retail price: 1649 yen These are rush grass (igusa) mats for placing under furniture. They prevent dents and scratches on tatami mats caused by the weight of tables, beds, etc. They're also great as mats for displaying small items or vases. I used them under table legs for about a month. They helped prevent the tatami from denting. The surface that was used has marks as shown in the photos. The back side is clean, so you can flip them over and use them. Please check the photos and understand that these are used items before purchasing.