Question: what is the size difference between a full and double bed?
Answer: What's the Difference Between a Double Bed and Full Size Mattress? A double bed and a full size mattress have the same dimensions, 54 inches by 75 inches. In fact, the terms “double bed” and “full size mattress”, are often used… A double bed and a full size mattress have the same dimensions, 54 inches by 75 inches.