A California King is a type of mattress that measures 72 inches wide by 84 inches long. It is designed to provide extra length, making it ideal for taller individuals who need more space to stretch out comfortably. This size is popular among couples who want more room to move without compromising on length. The California King is often confused with the standard King size, which is wider but shorter. While a standard King measures 76 inches wide by 80 inches long, the California King offers a unique balance of length and width. Both sizes are commonly used in luxury bedding and are available in various materials and styles.