Madagascar covers 594,622 km² km² on the new Equal Earth world map — 0.4%% of all land on Earth, making it the 46th largest country in the world and the 21st largest in Africa. At 19° latitude Mercator only inflates Madagascar by about 12%%, so the old and new maps largely agree on it — unlike the far north, where Mercator's stretch is dramatic.
For scale: Madagascar is roughly the same size as Kenya (594,848 km² km²).
You could fit 3 of Tunisia inside Madagascar.