Chile:
slightly smaller than twice the size of Montana

China:
slightly smaller than the US

Christmas Island:
about 0.7 times the size of Washington, DC

Clipperton Island:
about 12 times the size of The Mall in
Washington, DC

Cocos (Keeling) Islands:
about 24 times the size of The Mall in
Washington, DC

Colombia:
slightly less than three times the size of Montana

Comoros:
slightly more than 12 times the size of Washington, DC

Congo, Democratic Republic of the: slightly less than one-fourth the size of the US

Congo, Republic of the:
slightly smaller than Montana

Cook Islands:
1.3 times the size of Washington, DC