Ethiopia dwarfs North America: about 1,131,761 km² km² against 24,710,000 km² km². At true size Ethiopia is about 21.8× larger — the whole of North America fits into Ethiopia roughly 21 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.
Ethiopia fits 21× into North America.