Zambia covers 755,593 km² km² on the new Equal Earth world map — 0.6%% of all land on Earth, making it the 38th largest country in the world and the 17th largest in Africa. At 13° latitude Mercator only inflates Zambia by about 6%%, so the old and new maps largely agree on it — unlike the far north, where Mercator's stretch is dramatic.
For scale: Zambia is roughly the same size as Chile (737,442 km² km²).
You could fit 3 of United Kingdom inside Zambia.