King (76 x 80") Adjustable Beds
A king adjustable bed measures approximately 76 x 80" and is a somewhat common size for electric beds that is readily-available. This configuration is designed to use a traditional one-piece king mattress atop a unique electric base which starts out as two pieces (a head portion, and a foot portion), which are then bolted together to form a giant 76 x 80" platform for the mattress. A king adjustable bed represents the lowest cost per square inch of space.
Although this size is readily-available, Split King adjustable beds are considerably more-common and have a wider variety of selection.
If a couple is sharing a king adjustable bed, please keep in mind you'll be sharing one remote to control the bed. Consider a Split King or Split California King should you wish to have two separate mattresses with individual remote controls.