Saint Kitts and Nevis:
This Caribbean country has an area of 269 sq km. Nevis is the smaller island of the two and is guaranteed the right to secede.
Marshall Islands:
The world’s largest atoll, Kwajalein, reefs, and 34 islands together form the Marshall Islands that spread over 181 sq km and has a population 58,000. They were formerly under US administration but gained independence in 1986.
Tuvalu:
Nine coral atolls make up these islands spread over 23 sq km in Polynesia. Population: 12,000
Nauru:
Formerly known Pleasant Island, this 22 square km of land in the Pacific Ocean has 13,000 residents.