9 cm — Percentile Ranking
Erect Length
Percentile1th
ClassificationBelow average
Z-score-2.48
vs. Mean-4.12 cm
Erect length distribution Distribution (cm)
Erect Girth
Percentile1th
ClassificationBelow average
Z-score-2.42
vs. Mean-2.66 cm
Erect girth distribution Distribution (cm)
What This Means
A erect size of 9 cm places you below the population average. However, research consistently shows that penile size has minimal correlation with sexual satisfaction for either partner. This is based on the Veale et al. (2015) systematic review of 15,521 men.
How Common Is 9 cm?
Percentile1th
Men measuring shorter1%
Men measuring longer99%
About 1% of men have a erect length below 9 cm and 99% are above it — roughly 1 in 2 men measure longer. Distribution based on the Veale et al. (2015) systematic review of 15,521 men.