Nepal measures around 800 kilometers (497 mi) along its Himalayan hub by 150 to 250 kilometers (93 to 155 mi) over. Nepal has a zone of 147,181 square kilometers (56,827 sq mi). Nepal is landlocked by India on three sides and China's Tibet Autonomous Region toward the north. West Bengal's thin Siliguri Corridor or Chicken's Neck isolates Nepal and Bangladesh. Toward the east are India and Bhutan.
Nepal has four geographical regions 1. Terai (Flatlands) 2. Hilly 3. Himalayan 4. Trans Himalayan