Mattress Measurements. A king mattress is 76 inches wide and 80 inches long, compared to the California or western king, which is 72 inches wide and 84 inches long. read more
Even though the names are similar, a king and California king mattress are not the same size, nor are their respective sheets. A king mattress, also called an eastern king, is four inches wider and shorter than a California or western king mattress. read more
California king sheets are sized to fit a California king mattress. Commonly found on the West Coast (hence the name), the California king is the longest standard mattress size. Standard king-size fitted sheets, therefore, are unlikely to fit a California king mattress. read more