+Cardinal numbers describe the "size" or cardinality of a [Set](/wiki/set). They extend the idea of counting finite objects to compare and distinguish different "sizes" of [Infinity](/wiki/infinity).
+## See also
+- [Ordinal Numbers](/wiki/ordinal_numbers)
+- [Countable Set](/wiki/countable_set)
+- [Uncountable Set](/wiki/uncountable_set)
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