Guyana covers 211,930 km² km² on the new Equal Earth world map — 0.2%% of all land on Earth, making it the 84th largest country in the world and the 10th largest in South America. At 5° latitude Mercator only inflates Guyana by about 1%%, so the old and new maps largely agree on it — unlike the far north, where Mercator's stretch is dramatic.
For scale: Guyana is roughly the same size as United Kingdom (239,616 km² km²).
You could fit 3 of Ireland inside Guyana.