Asia is the world's largest continent and is bordered to the west by Europe, the Mediterranean Sea, the Black Sea and the Caspian Sea. Asia is bordered by the Pacific Ocean to the east. The Arctic Ocean and various other seas meet the northern border of Asia.
Asia is bordered by the Indian Ocean to the south. Asia's immense land area of 17,212,000 square miles makes up 8.7 percent of Earth's total surface area and 30 percent of Earth's total land area. Asia consists of 48 countries. The Asian countries of Russia and Turkey also have part of their land in Europe.