ZXKE Cushion Covers Grids Design Cotton Linen Home Throw Pillow Cases Square 18" X 18" (Black) Material: durable cotton linen cloth material Size: 1818 inches/4545 cm, please allow 0.5-1" deviation Grids pattern design cotton linen cushion cases, the grids pattern are both sides Hidden zipper design, safe to machine wash This is just cushion cover, pillow insert are not included