Islands are not in continents except Lake islands. They are near to one or the other continent. I'll give the 10 largest here:
1. Greenland (823,000miles^2) -- near N.America
2. New Guinea (311,000miles^2) -- between Asia & Australia
3. Borneo (287,000miles^2) -- near Asia
4. Madagascar (227,000miles^2) -- near Africa
5. Baffin (184,000miles^2) -- N.America
6. Sumatra (156,000miles^2) -- near Asia
7. Honshu (88,000miles^2) -- near Asia
8. Great Britain (84,400miles^2) -- near Europe
9. Ellesmere (82,100miles^2) -- N.America
10. Victoria (81,900miles^2) -- N.America
In these Nos.2, 3, 6 are in Sunda (Indonesian) archipelago. Nos. 5, 9, 10 are in Queen Elizabeth archipelago in Canada, to the north.