King-size pillows are larger than standard pillows, measuring approximately 20 by 36 inches. They are designed to provide extra support and comfort for those who sleep on a king-size bed or prefer more space while resting. These pillows can be filled with various materials, including memory foam, down, or synthetic fibers, catering to different sleep preferences. Due to their size, king-size pillows can also serve decorative purposes on a bed, often used with decorative pillow shams or covers. They are ideal for couples who share a bed, as they offer ample room for both individuals to find a comfortable sleeping position.