Afghanistan dwarfs North America: about 642,058 km² km² against 24,710,000 km² km². At true size Afghanistan is about 38.5× larger — the whole of North America fits into Afghanistan roughly 38 times.
The old Mercator map treated both about equally (1.5× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Afghanistan fits 38× into North America.