Sierra Leone covers 71,877 km² km² on the new Equal Earth world map — 0.1%% of all land on Earth, making it the 119th largest country in the world and the 42nd largest in Africa. At 9° latitude Mercator only inflates Sierra Leone by about 2%%, so the old and new maps largely agree on it — unlike the far north, where Mercator's stretch is dramatic.
For scale: Sierra Leone is roughly the same size as Ireland (68,700 km² km²).