Map of countries of the European Union.

Currently there are 49 independent states in Europe.
Differences:
Depending on their length: the rule is Russia's largest and the smallest Andorra
Depending on your situation: almost all have sea
Depending on their shape: Many are fragmented
According to its population: The most populated is Russia and the least populated is San marino
According to your wealth: wealthier and poorer are  German and Moldova.