Indonesia dwarfs North America: about 1,872,242 km² km² against 24,710,000 km² km². At true size Indonesia is about 13.2× larger — the whole of North America fits into Indonesia roughly 13 times.
The old Mercator map treated both about equally (1× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Indonesia fits 13× into North America.