Its greatest length north to south is only 18 miles (29 km) and its greatest breadth east to west is 17 miles (27 km). It is the smallest historic county in England and the fourth smallest in the UK as a whole. Because of this, the Latin motto Multum in Parvo or "much in little" was adopted by the county council in 1950.[2] It has the smallest population of any normal unitary authority in England.