<Ul> <Li> 2017 Korean crisis </Li> </Ul> <Li> 2017 Korean crisis </Li> <P> The Korean Demilitarized Zone (DMZ; Hangul: 한반도 비무장 지대; Hanja: 韓 半島 非 武裝 地帶), informally known as the 38th Parallel, is a strip of land running across the Korean Peninsula . It is established by the provisions of the Korean Armistice Agreement to serve as a buffer zone between the Democratic People's Republic of Korea (North Korea) and the Republic of Korea (South Korea). The demilitarized zone (DMZ) is a border barrier that divides the Korean Peninsula roughly in half . It was created by agreement between North Korea, China and the United Nations in 1953 . The DMZ is 250 kilometres (160 miles) long, and about 4 kilometres (2.5 miles) wide . </P> <P> Within the DMZ is a meeting point between the two nations in the small Joint Security Area near the western end of the zone, where negotiations take place . There have been various incidents in and around the DMZ, with military and civilian casualties on both sides . </P>

How big is the border between north and south korea