Papua New Guinea:
slightly larger than California
Paracel Islands:
NA
Paraguay:
slightly smaller than California
Peru:
slightly smaller than Alaska
Philippines:
slightly larger than Arizona
Pitcairn Islands:
about 0.3 times the size of Washington, DC
Poland:
slightly smaller than New Mexico
Portugal:
slightly smaller than Indiana
Puerto Rico:
slightly less than three times the size of Rhode Island
Qatar:
slightly smaller than Connecticut