Generic Personalized ( Anime Homestuck ) DIY Pillow Cover Size 20"X36" suitable for California King-bed Pillowcase,no pillow core,One Side Printed Size: 20 x 36 inches Made of cotton and polyester,zipper on the side. It is made with medium weight ,high quality 50% cotton ,50% polyester for comfort and durability The unique pillowcase is a good gift for your friends and relatives