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
Brunei–Malaysia border Malaysian press reports, saying the Limbang Question was never discussed during negotiations for the Exchange of Letters. Malaysia subsequently said the Limbang Question will be settled once the survey and demarcation of the boundary between the two countries is completed. Finally on 2009, with the report from Brunei media, they announced an end to claim over each other's land, and said to resolve issues related to their maritime borders. In terms of boundary delimitation in general, the Letters of Exchange provided for the ending of the dispute by virtue of Brunei agreeing to affirm the five historical border agreements. For