Custom Cotton & Polyester Soft Square Zippered Cushion Throw Case Pillow Case Cover 18X18 (Twin Sides) - Symbolon Painter Artist Gustav Klimt Painting " Life Tree " Personalized Pillowcase Zise:18*18 inches. Fits most standard and queen size pillows Comfortable and 100% Brand New Made of 50% cotton, 50% polyester! Both sides have images, zipper on the one side Wash separately with warm water, do not wash with other clothing Easy cleaning and maintenance