Alaskan King Vs King Size Bed 2025. For reference, an alaskan king bed size in feet measures 9 by. In simpler terms, it provides 9 feet of sleeping space in both width and length.

Learn exactly how big an alaskan king bed is and discover if it’s the right size for your bedroom needs. The alaskan king bed size is the biggest bed size of all our king contenders, coming in at a measurement of 108 inches wide by 108 inches long, or 108” x 108”.