Spain covers 506,178 km² km² on the new Equal Earth world map — 0.4%% of all land on Earth, making it the 51st largest country in the world and the 4th largest in Europe. At 40° latitude the old Mercator map inflates area by about 1.7×, so it drew Spain closer to 865,564 km² km² — a difference of roughly 71%%.
For scale: Spain is roughly the same size as Thailand (515,720 km² km²).
You could fit 3 of Tunisia inside Spain.