North America dwarfs Ukraine: about 24,710,000 km² km² against 570,135 km² km². At true size North America is about 43.3× larger — the whole of Ukraine fits into North America roughly 43 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 43× into North America.