Members of the OECS:
Organization of Eastern Caribbean States
The OECS is a trade agreement that currently consists of eight countries in Caribbean.
All member states comprise a total area of 3,000 km² and about 0.57 million people. This is 0.00 percent of the habitable area around the world and 0.01 percent of the world population. The value of all exported goods from these eight countries was 2.55 billion US dollars per year at last count.
Official website: https://www.oecs.org/en/