Peninsular (West Malaysia)

Peninsular Malaysia also known as Malaya or West Malaysia, is the part of Malaysia which lies on the Malay Peninsula and surrounding islands. Its area is 132,265 square kilometres (51,068 sq mi), which is nearly 40% of the total area of the country - 330,611 square kilometres (127,650 sq mi)

Peninsular Malaysia consists of the following 11 states and two federal territories (starting from the North going to the South):
Northern Region: Perlis, Kedah, Penang, Perak
East Coast Region: Kelantan, Terengganu, Pahang
Central Region: Selangor, federal territories of Kuala Lumpur and Putrajaya
Southern Region: Negeri Sembilan, Malacca, Johor

Borneo (East Malaysia)

East Malaysia (Malaysia Timur), also known as Sabah, Sarawak and Labuan (Sabah, Sarawak and Labuan) or Malaysian Borneo, is the part of Malaysia on the island of Borneo, the world's third largest island.

It consists of the Malaysian states of Sabah, closer to the Philippines than the west of the country, Sarawak in the west and the Federal Territory of Labuan.