Chad dwarfs Europe: about 1,270,927 km² km² against 10,180,000 km² km². At true size Chad is about 8× larger — the whole of Europe fits into Chad roughly 8 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.
Chad fits 8× into Europe.