20 cm — Percentile Ranking
Erect Length
Percentile100th
ClassificationAbove average
Z-score4.14
vs. Mean6.88 cm
Erect length distribution Distribution (cm)
Erect Girth
Percentile100th
ClassificationAbove average
Z-score7.58
vs. Mean8.34 cm
Erect girth distribution Distribution (cm)
What This Means
A erect size of 20 cm places you above the population average. This is based on the Veale et al. (2015) systematic review of 15,521 men.
How Common Is 20 cm?
Percentile100th
Men measuring shorter100%
Men measuring longer0%
About 100% of men have a erect length below 20 cm and 0% are above it — fewer than 1 in 100 men measure longer. Distribution based on the Veale et al. (2015) systematic review of 15,521 men.