An Alaskan King bed measures 108 inches wide by 108 inches long, which is equivalent to 9 feet by 9 feet

. This makes it the largest king-size bed available on the market, with a total surface area of 81 square feet (or 11,664 square inches)

. To put this in perspective:

• It is 32 inches wider and 28 inches longer than a standard king bed (76" x 80")

• It is 36 inches wider and 24 inches longer than a California king bed (72" x 84")

• It can comfortably sleep up to four adults or a couple with children and pets

The Alaskan King bed is a perfect square shape and requires a very large bedroom space, ideally at least 15 feet by 15 feet or larger to accommodate it comfortably

. It is often considered a luxury item due to its size, rarity, and cost

. In summary, the Alaskan King bed is 9 feet by 9 feet, making it the biggest king-size mattress size available, designed for those who want maximum sleeping space and comfort.