Pakistan is 2.6 times larger than Oman.
Area: 309,500 km2 World Factbook
Population: 3,219,775 (July 2014) World Factbook
Oman, officially called the Sultanate of Oman, is an Arab state in southwest Asia on the southeast coast of the Arabian Peninsula. It has a strategically important position at the mouth of the Persian Gulf. Wikipedia
Area: 796,095 km2 World Factbook
Population: 196,174,380 (July 2014) World Factbook
Pakistan officially the Islamic Republic of Pakistan, is a sovereign country in South Asia. With a population exceeding 180 million people, it is the sixth most populous country and with an area covering 796,095 km², it is the 36th largest country in the world in terms of area. Wikipedia