A king-size bed is the widest at 76 inches long, while the California king-size bed is the longest at 84 inches. In comparison, a king-size bed is 80 inches long, and the California king-size is 72 inches wide.
The size bed that people choose has a lot to do with sleeping habits. Married couples often prefer king beds because they have as much room as they would if they were sleeping on a twin bed by themselves.
Over the years, more sizes for beds have been created to accommodate children. For example, instead of going from a crib to a twin, parents can choose a toddler bed to make the transition easier.