I love these! Right now on Amazon you can get You Are My Sunshine Pillow Covers for $5.07!
It has awesome reviews and ships free with Amazon Prime or Free Super Saver Shipping.
Go here to get one>>>>You Are My Sunshine Cotton Linen Pillow Cover, 17.3 x 17.3-Inch
About 17.3(L)*17.3(W) Inch. 44CM*44CM
Pattern:You Are My Sunshine
Made of durable cotton linen cloth material
Insert are not included
This case(cover) has an Invisible zipper