Mama Christmas Theme Square Throw Pillowcase Body Art Nude Dark Nature Pillow Covers 18x18 Inch (Twin Side) Insert are not included. It usually takes 8-14 working days for delivery. The Pillowcase material is 50% cotton , 50% polyester. Size: 18x18 inches Twin sides (The front side is the same to the back side) Hidden zipper looks nice and is two inches shorter than the pillowcase,which makes the pillow insert easy to slip in and out.