Pop Home Cotton Polyester Square Throw Pillow Case Decorative Cushion Cover Pillowcase for Sofa Cute Guinea Pig 18" x 18" It usually takes 8-14 working days for delivery. This pillow cover is made out of 50% Cotton and 50% Polyester. Size: 18"x18" 45x45 Cm, Twin sides (The Front side is the same to the back side.) Please notice the item can't including Filler,just the cover only ! Hidden zipper looks nice and is two inches shorter than the pillowcase,which makes the pillow insert easy to slip in and out.