Question: how big is a king size mattress compared to a queen?
Answer: The queen mattress dimensions are 60 inches (5 feet) in width by 80 inches (6 feet, 8 inches) in length. The king mattress dimensions are 76 inches (6 feet, 4 inches) in width by 80 inches (6 feet, 8 inches) in length. The length of the two sizes is identical at 80 inches.