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Vietnamese study on penile length

A 2022-23 Vietnamese study that reported a correlation coefficient of 0.73 between stretched flaccid penile length and erect penile length

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Jan 12, 2026
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What is the average flaccid vs erect penis size and how do they correlate?

A preponderance of systematic reviews and large measured studies place the average flaccid penile length around 9–9.5 cm and the average erect length around 13–14 cm, with stretched length clustering ...