While Germany would be the 5th state by size, it is only 3.6% of the area of the United States.
(Those of us who grew up when there were two Germanies knew it as even smaller - only 2.5% of the US' area...)
I learned this when being berated by my German hosts about the fact that you could at that time mail a letter "anywhere in the country by 4pm" and have it delivered the very next day, as an example of how efficient the Deutsche Post was.
We'd usually make up by drinking some good Weizenbier, so it was all good.
Germany is a bit bigger than New Mexico, but a bit smaller than Montana. If it was a US state it'd be 5th by size.