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What is the difference about n in a independent t-test and a matched pair at-test

What is the difference about n in a independent t-test and a matched pair at-test
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An Independent-Samples T-Test compares two sample means from different populations regarding the same variable to determine whether the difference between the two means is statistically significant or occurred by chance alone.

A matched pair t-Test compares two sample means from the same population regarding the same variable at two different times such as during a pre-test and post-test, or it compares two sample means from different populations whose members have been matched, to determine whether the difference between the two means is statistically significant or occurred by chance alone.

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