South America dwarfs Sudan: about 17,840,000 km² km² against 1,863,027 km² km². At true size South America is about 9.6× larger — the whole of Sudan fits into South America roughly 9 times.
The old Mercator map treated both about equally (1× vs 1.1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Sudan fits 9× into South America.