Algeria dwarfs North America: about 2,322,788 km² km² against 24,710,000 km² km². At true size Algeria is about 10.6× larger — the whole of North America fits into Algeria roughly 10 times.
The old Mercator map treated both about equally (1.3× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Algeria fits 10× into North America.