Parañaque is 2.5 times larger than Pasay.
Area: 45 km2 calculated
Parañaque, officially the City of Parañaque, is one of the cities and municipalities that make up Metro Manila in the Philippines. Wikipedia
Area: 18 km2 calculated
Pasay, officially the City of Pasay, is one of the cities and municipalities that make up Metro Manila in the Philippines. It is bordered on the north by the country's capital, the City of Manila, to the northeast by Makati City, to the east by Taguig City, and Parañaque City to the south. Wikipedia