From Peacock Alley, this pillow protector features: For even more convenience, consider having additional 400 thread count cotton sateen pillow protectors on hand to help extend the life of your new pillow. Make sure to use one continuously to maintain our 100-night warranty . 400 thread count cotton sateen Standard Pillow Protectors  approx. 20" W x 26" L King Pillow Protectors approx.  20" W  x 36" L  Sold individually, each size sold separately Professionally launder or machine wash cold, gentle cycle. Imported.