This writeup is the core of what once was an "Islands Metanode", since broken into several pieces and deleted.
This list is by no means exhaustive, or even consistent in detail.  Feel free to /msg me for additions or node your own branches.

World's ten largest islands:
  1. Greenland
  2. New Guinea
  3. Borneo
  4. Madagascar
  5. Baffin Island
  6. Sumatra
  7. Honshu
  8. Great Britain
  9. Victoria Island
  10. Ellesmere

Real Islands


Sources:

Memory
e2 node search
The Great Geographical Atlas, Rand McNally, 1982 rev. 1989
Oxford World Atlas, Oxford University Press, 1973
Routemaster Road Atlas of Great Britain, 1998