Europe dwarfs Ukraine: about 10,180,000 km² km² against 570,135 km² km². At true size Europe is about 17.9× larger — the whole of Ukraine fits into Europe roughly 17 times.
The old Mercator map treated both about equally (1× vs 2.3× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Ukraine fits 17× into Europe.