Q:

What is the area size of Skull Island in the King Kong (2005) movie? 

The Skull Island in the 2005 version of King Kong is very unique: it is an ecosystem of primordial creatures that are battling for food, space, and their ecosystem on a sinking island.  The wide variety of creatures including the "neosaurians" is made clear, though the island seems to be filled with too many such creatures. 
Many other media that show "lost world" settings in modern times often depict the region filled with known species of dinosaurs, which is unlikely as millions of years of evolution in an ever-changing environment would change the dinosaurs and the species as a whole into something else.  
But my main question is what is the area size of the Skull Island in the 2005 version of the movie?  Just curious to know!!! 

A:

There are two scale maps in the The World of Kong: A Natural History of Skull Island factbook, based on the film.  The first advises us that it's 1:50000 (e.g. 1cm = 500 meters).  Later in the same book we have a simplified topographical map set to the same scale with a scale in cm below it.  
Skull Island is shown to be approximately 14.5km x 19km giving it a total area (including sea) of 275 sq km.  Approximately 33% of this area is land, giving a rough land area of 100 sq km, equivalent to the island that forms the British Overseas Territory of Monserrat

