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The cited length differs greatly among sources, for whatever reasons (extension, folding, definition of small versus large, etc.).

For an entire intestinal tract length (including small and large intestines) of 25 ft long (7.6 meters), the small intestine alone makes up about 20 feet (80%).

However, the average small intestine is from 16 to 23 feet long (5 to 7 meters). It is slightly longer in women. The length can vary greatly in certain individuals, from 9 to 34 feet.

The average adult's small intestine is between 2 and 3 cm wide (about 1 inch).

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7y ago

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