Tile carpet, pet carpet. The back is non-slip, so please remove the film before use. Dark gray and gray colors, one piece is about 30cm x 30cm, about 5mm thick. There are 20 dark gray tiles and 20 gray tiles, for a total of 40 tiles. Shipping will be in a recycled cardboard box via anonymous delivery by Kuroneko Yamato or Yu-Pack. Thank you for looking.