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It depends on what you started with.

I recall reading a study that stated that the average male will loose as much as .5 inches of penis length every 10 years after age 30.

So if you are average, and at age thirty you had a penis size of 6 inches from base to tip (average size males range from 4 to 6 inches), then by age 45, you should be somewhere in the neighborhood of 5.25 inches.

Keep in mind that this is the size of your penis in it's flaccid state. Erection size has more to do with good blood circulation that musculature.

Also, good diet and exercise as well as keeping your weight under control can delay penis shrinkage due to aging as well as many other physical deficiencies that arise as a result of the aging process.

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14y ago
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13y ago

World wide average is 5.8 inches.

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11y ago

the same when he was 17 years.

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11y ago

About 4-5 inches

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Q: What is the average size of a 50 year old man's penis?
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