Saint Barthélemy vs Saint Martin

Saint Martin is 2.21 times larger than Saint Barthélemy. Saint Barthélemy would fit into Saint Martin about 2.2 times.

Saint BarthélemySaint MartinSaint Barthélemy moved onto Saint Martin · Equal-area projection
0.45×
Saint Barthélemy is 0.45× the area of Saint Martin. Put the other way, Saint Martin is 2.21× the size of Saint Barthélemy.
Saint BarthélemySaint Martin
Area24 km²53 km²
Population10,12424,941
Density422 / km²471 / km²
CapitalGustaviaMarigot
RegionCaribbeanCaribbean
CoastlineHas a coastHas a coast
Neighbours01

Why the map you grew up with disagrees

On a Mercator map, area grows with distance from the equator. Saint Barthélemy sits at about 18°N and is stretched to 1.1× its true area; Saint Martin at 18° N is stretched to 1.11×. 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 Saint Barthélemy bigger than Saint Martin?
No. Saint Barthélemy is 2.21 times smaller than Saint Martin. Saint Barthélemy covers 24 km² and Saint Martin covers 53 km².
How many times does Saint Barthélemy fit into Saint Martin?
About 2.2 times: Saint Martin has 2.21× the area of Saint Barthélemy.
Why do Saint Barthélemy and Saint Martin look different on Google Maps?
Web maps use the Mercator projection, which stretches area with distance from the equator. Saint Barthélemy is drawn about 1.1× its true area there and Saint Martin about 1.11×. 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, Saint Barthélemy or Saint Martin?
Saint Martin: 24,941 people against 10,124. Density: Saint Barthélemy 422 per km², Saint Martin 471 per km².