King size sheets are designed to fit king size mattresses, which typically measure 76 inches wide by 80 inches long. These sheets provide ample coverage and comfort for individuals or couples who prefer a spacious sleeping area. Available in various materials like cotton, polyester, and blends, king size sheets come in different thread counts and styles. They usually include a fitted sheet, a flat sheet, and pillowcases, accommodating standard or king size pillows. Choosing the right set can enhance sleep quality and bedroom aesthetics.