Question: what is the difference between a king and california king mattress?
Answer: What is a California King Size? A California king mattress (also known as a Western king) measures 72 inches by 84 inches, and is identical to two twin XL mattresses put together. ... Since the Cal king mattress is more narrow than a king-size, it may have room to fit 1 to 2 small children in addition to two adults.