What exactly is a "split" king size?

A "split" king size bed refers to a king size bed that is split into two separate mattresses. Essentially, it is two twin XL mattresses placed side by side to create the dimensions of a king size bed. Each twin XL mattress typically measures 38 inches wide by 80 inches long, while a standard king size mattress measures 76 inches wide by 80 inches long. Therefore, a split king size bed would measure 76 inches wide by 80 inches long, but with two separate mattresses that can be adjusted independently on either side of the bed to suit the individual preferences of each sleeper. This type of bed is often used with an adjustable bed frame or base that allows each person to customize their sleeping position.