Mauritania
slightly larger than three times the size of New Mexico
Mauritius
almost 11 times the size of Washington, DC
Mayotte
slightly more than twice the size of Washington, DC
Mexico
slightly less than three times the size of Texas
Micronesia, Federated States of
four times the size of Washington,
DC (land area only)
Moldova
slightly larger than Maryland
Monaco
about three times the size of The Mall in Washington, DC
Mongolia
slightly smaller than Alaska
Montenegro
slightly smaller than Connecticut
Montserrat
about 0.6 times the size of Washington, DC