If you are placing the area rug beneath a queen size bed, a 5′ x 8′ area rug will fit nicely. The 5′ x 8′ area rug is also suited to smaller living room spaces and dining rooms. For a king size bed or a California king bed, a 6′ x 10′ area rug is better suited. The 6′ x 10′ area rug is the best option for larger spaces around the house.