6
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24 inches
72 feet (6 sides x 12 = 72).
12*6 = 72 inches.
If it is a regular 6 sided hexagon then its perimeter is 6 times 12 = 72 inches
The Answers community requires more information for this question. Please edit your question to include more context. It is not clear from the question what it is that is 12 inches long: the side of the hexagon or the hexagon itself.