EXTRA DEEP POCKET KING SHEETS / EXTRA DEEP FITTED KING SHEETS: These bed sheets are for very deep pocket mattresses. They fit any mattress with pockets that are 18, 20, 21, 22 and 24 inches deep. There's stretchable elastic around the extra deep fitted sheet which stretches for a nice tug around your mattress. Perfect for extra tall & large mattresses. Rest assured these oversized sheets will stay on tight & stay in place! 6 PIECE SHEET SET: This bed sheet set comes with 4 pillowcases total. The pillowcases feature secure enclosure designs. This bedding set is crafted to fit your extra thick mattress perfectly, giving you a soft, cozy, and breathable sleep experience. GREAT FOR DOUBLE PILLOW TOP MATTRESS: These bed sheets are perfect for mattresses with a 3 inch or 4 inch topper on top, memory foam toppers, big mattress pads, pillow tops, foam toppers, big foam toppers, pillow top mattresses and memory foam. These sheets will not come off. MICROFIBER: These are the softest type of microfiber bed sheets we have created. Super soft with a light feel. Not crisp like cotton. If you're accustomed to cotton sheets and you've never tried microfiber sheets we recommend you give these a try. They're even softer than cotton! DIMENSIONS & SIZES: Flat Sheet 111 wide and 102 long. Fitted sheet 78 wide and 80 long with 21 inch pockets (has elastic so it can stretch). All four pillow cases are oversized 20 x 40 inch.