Marion Island, the larger of the two islands, is located at. It is roughly 19 km (12 miles) long and 12 km (7 mi) wide with a surface of 290 km² (112 sq mi) and a coastline of some 72 km (45 mi), most of which are high cliffs. The highest point on Marion Island is Mascarin Peak (Formerly State President Swart Peak), reaching 1242 m (4,274 ft) above sea level. Boot Rock is about 150 meters (500 ft) off the northern coast.
Prince Edward Island is much smaller (only about 45 km², 17 sq mi) and lies some 12 nm (19 km) to the northeast. Prince Edward Island is located at [show location on an interactive map] 46°38′39″S, 37°56′36″E. At the Von Zinderen Bakker Peak northwest of the center, it reaches a height of 672 meters (2,204 ft). There are a few offshore rocks along the northern coast, like Ship Rock (100 meters, 330 ft, north of northernmost point) and Ross Rocks (500 meters, 1650 ft, from the shore).