Asia dwarfs Ukraine: about 44,580,000 km² km² against 570,135 km² km². At true size Asia is about 78.2× larger — the whole of Ukraine fits into Asia roughly 78 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 78× into Asia.