East Malaysia is 50% bigger than Peninsular Malaysia at , comparable with South Dakota or Great Britain. East Malaysia contains the five highest mountains in Malaysia, the highest being Mount Kinabalu at 4095 m, which is also the highest mountain in Borneo and the 10th highest mountain peak in Southeast Asia. It also contains the two longest rivers in Malaysia – Rajang River and Kinabatangan River. Banggi Island in Sabah and Bruit Island in Sarawak are the two largest islands that are located entirely within Malaysia. The largest island is Borneo, which is shared with Indonesia and Brunei. The second largest island
Indonesia–Malaysia border the incident. All detainees were released by 17 August 2010 but the incident unleashed a wave of anti-Malaysia sentiments in Indonesia. Both Indonesia and Malaysia agreed that the maritime border between the two countries in the area has not been determined. Indonesia claimed that it was ready to begin negotiations to determine the border but said that the Malaysians, which relies on its 1979 territorial waters and continental shelf limit map as the basis for its claim in the area, were not ready as they wanted to settle its maritime border with Singapore adjacent to the area first following the