Closer than most people guess: Libya (1,626,369 km² km²) is only about 25%% larger than Peru (1,296,279 km² km²).
Libya sits in Africa, Peru in South America. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 1.3×.
The old Mercator map treated both about equally (1.3× vs 1× inflation), so at least their relative sizes were preserved — even if both were drawn at the wrong absolute scale.
Peru fits 1× into Libya.