Thailand vs Vietnam

Thailand is 55% larger than Vietnam. Vietnam would fit into Thailand about 1.5 times.

ThailandVietnamThailand moved onto Vietnam · Equal-area projection
1.55×
Thailand is 1.55× the area of Vietnam.
ThailandVietnam
Area513,120 km²331,690 km²
Population71,619,863101,598,527
Density140 / km²306 / km²
CapitalBangkokHanoi
RegionSouth-Eastern AsiaSouth-Eastern Asia
CoastlineHas a coastHas a coast
Neighbours43

Why the map you grew up with disagrees

On a Mercator map, area grows with distance from the equator. Thailand sits at about 15°N and is stretched to 1.07× 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 Thailand bigger than Vietnam?
Yes. Thailand is 55% larger than Vietnam. Thailand covers 513,120 km² and Vietnam covers 331,690 km².
How many times does Vietnam fit into Thailand?
About 1.5 times: Thailand has 1.55× the area of Vietnam.
Why do Thailand and Vietnam look different on Google Maps?
Web maps use the Mercator projection, which stretches area with distance from the equator. Thailand is drawn about 1.07× 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, Thailand or Vietnam?
Vietnam: 101,598,527 people against 71,619,863. Density: Thailand 140 per km², Vietnam 306 per km².