Saudi Arabia dwarfs South America: about 1,925,871 km² km² against 17,840,000 km² km². At true size Saudi Arabia is about 9.3× larger — the whole of South America fits into Saudi Arabia roughly 9 times.
The old Mercator map treated both about equally (1.2× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Saudi Arabia fits 9× into South America.