Greenland vs Brazil: which is bigger?
Brazil is bigger: 8,515,767 km² against 2,166,086 km², about 3.9 times the size of Greenland.
Drop Greenland onto Brazil →Side by side at true size
Both drawn at the same scale on an equal-area projection.
And on the usual world map
On the usual world map it's the other way round: Greenland looks 3.9 times bigger than Brazil, because the map inflates Greenland about 16 times and Brazil only 1.06 times.
In numbers
Areas: official totals including inland water (UN Statistics Division via Wikidata). Outlines: Natural Earth. How Globegami works