Bolivia dwarfs South America: about 1,090,271 km² km² against 17,840,000 km² km². At true size Bolivia is about 16.4× larger — the whole of South America fits into Bolivia roughly 16 times.
The old Mercator map treated both about equally (1.1× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Bolivia fits 16× into South America.