The Armenia–Azerbaijan border (Armenian: Հայաստան–Ադրբեջան սահման, romanized: Hayastan–Adrbejan sahman, Azerbaijani: Azərbaycan–Ermənistan sərhədi) is the international border between Armenia and Azerbaijan. The border is said to be either 996 km (619 mi)[1] or 1,007.1 km (625.8 mi) long.[2]