Specification Size: 18" x 18" Set of 4 ,Fit in both 18" and 20" Pillow Inserts Super Durable Material Also Adds Comforts to the Feel ZIPPER: Invisible zipper enclosures for an elegant look. Works smoothly. Reinforced seams hold up well to wear and washing. Farmhouse style design Retro pattern type pillow covers are perfect match for modern and minimalist style Boho and floral patterns are perfect for a holiday style and outdoor use. warm tips： 1.Please allow 1-2CM differs due to manual measurement. 2.There maybe slightly color difference due to different monitor 3.Please do not immerse the pillowcase directly in the water or leave it in the rainstorm