+**Cardinality** quantifies the "size" of a [set](/wiki/set), allowing comparison between collections of items without directly counting. It reveals how some infinities are larger than others, a profound concept defining the vast landscape of [infinity](/wiki/infinity) itself.
+## See also
+- [Bijection](/wiki/bijection)
+- [Countable Set](/wiki/countable_set)
+- [Uncountable Set](/wiki/uncountable_set)
... 1 more lines