Mongolia covers 1,560,428 km² km² on the new Equal Earth world map — 1.2%% of all land on Earth, making it the 19th largest country in the world and the 7th largest in Asia. At 47° latitude the old Mercator map inflates area by about 2.2×, so it drew Mongolia closer to 3,354,920 km² km² — a difference of roughly 115%%.
For scale: Mongolia is roughly the same size as Iran (1,622,847 km² km²).
You could fit 3 of Thailand inside Mongolia.