California King mattresses are available for purchase at warehouse clubs such as Sam's Club, department stores such as Macy's, online retailers such as Overstock and furniture stores such as Art Van. A California King mattress is also known as a Western King, according to About.com.
A California King mattress measures 72 inches wide and 84 inches long, while a standard, or Eastern King, mattress measures 76 inches wide and 80 inches long, notes About.com. Either mattress is wide enough to allow two adults to sleep comfortably. Because it is the longest bed available, a California King is a common choice for tall individuals. A California King bed set typically includes one mattress and two half-width box springs to make moving the bed more practical. The large size of the mattress makes it difficult to move, and it may not fit easily through doorways, up stairs, in hallways or around sharp turns.
Because bed manufacturers don't always use the standard measurements when making mattresses, it's important to know a California King bed's exact measurements before purchasing bedding, states About.com. King-size flat sheets fit either a standard or California-King bed, but fitted sheets are made for one or the other. Bedding made for King beds is generally the most expensive.