4pc Throw Pillow Cover Cotton Linen Square Protector 18 "X 18 " Material: Made of nature cotton blend linen, slightly rough texture, lightweight. Size: 18 x 18 inches, Suitable for most pillows. Unique design: Hidden zipper made it more beautiful and easy to wash. Every set contains 4 different patterns cover. Pillow insert are not included. Pattern only available in one side, another side is solid linen color.