Bolivia dwarfs Oceania: about 1,090,271 km² km² against 8,600,000 km² km². At true size Bolivia is about 7.9× larger — the whole of Oceania fits into Bolivia roughly 7 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 7× into Oceania.