A standard king bed is typically 76 inches (193 cm) wide and 80 inches (203 cm) long. This size provides a spacious sleeping area of about 42.22 square feet (3.92 square meters), making it the widest standard mattress size available

. In feet, this translates to 6 feet 4 inches wide by 6 feet 8 inches long

. The king bed is ideal for couples who want ample space or for those who share the bed with children or pets. Note that exact dimensions can vary slightly between manufacturers, but the 76" x 80" size is the common standard in the U.S.

. For comparison, a UK king size bed is usually slightly narrower, about 60 inches (152 cm) wide by 78 inches (198 cm) long