South Korea vs Vietnam

Vietnam is 3.31 times larger than South Korea. South Korea would fit into Vietnam about 3.3 times.

South KoreaVietnamSouth Korea moved onto Vietnam · Equal-area projection
0.3×
South Korea is 0.3× the area of Vietnam. Put the other way, Vietnam is 3.31× the size of South Korea.
South KoreaVietnam
Area100,295 km²331,690 km²
Population51,684,564101,598,527
Density515 / km²306 / km²
CapitalSeoulHanoi
RegionEastern AsiaSouth-Eastern Asia
CoastlineHas a coastHas a coast
Neighbours13

Why the map you grew up with disagrees

On a Mercator map, area grows with distance from the equator. South Korea sits at about 36°N and is stretched to 1.54× its true area; Vietnam at 17° N is stretched to 1.09×. Here the two are distorted about the same amount, so Mercator gets this pair roughly right. The figure above uses the Equal Earth projection, where every square kilometre is drawn the same size.

Questions about this pair

Is South Korea bigger than Vietnam?
No. South Korea is 3.31 times smaller than Vietnam. South Korea covers 100,295 km² and Vietnam covers 331,690 km².
How many times does South Korea fit into Vietnam?
About 3.3 times: Vietnam has 3.31× the area of South Korea.
Why do South Korea and Vietnam look different on Google Maps?
Web maps use the Mercator projection, which stretches area with distance from the equator. South Korea is drawn about 1.54× its true area there and Vietnam about 1.09×. For this pair the distortion is similar, so Mercator gets the comparison roughly right. Kartavera uses Equal Earth, where every square kilometre is drawn the same size.
Which has more people, South Korea or Vietnam?
Vietnam: 101,598,527 people against 51,684,564. Density: South Korea 515 per km², Vietnam 306 per km².