About This OUR PILLOWCASE SET HAS EARNED THE GOOD HOUSEKEEPING SEAL - Premium Set of 2 King Pillowcases (21" W u00D7 40" L): Simple open-end design (4u201D hem) with slip-on convenience, no zippers or flaps. These king size pillow case set of 2 pair well with our 400 thread count sheet sets. Independently tested to earn the pr