Palau
slightly more than 2.5 times the size of Washington, DC
Palmyra Atoll
about 20 times the size of The Mall in Washington, DC
Panama
slightly smaller than South Carolina
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