With an area of 242,500 square kilometres (93,600 sq mi), the UK is the 78th-largest sovereign state in the world.
It is also the 21st-most populous country, with an estimated 65.5 million inhabitants in 2016.
The adjective "British" is commonly used to refer to matters relating to the United Kingdom.
The term has no definite legal connotation, but is used in law to refer to United Kingdom citizenship and matters to do with nationality.
People of the United Kingdom use a number of different terms to describe their national identity and may identify themselves as being British; or as being English, Scottish, Welsh, Northern Irish, or Irish; However, it is usually abbreviated to "DU" for the mutated form "Y Deyrnas Unedig".