20 cm, by the Numbers
A 20 cm (7.9 in) erect penis sits at the >99.9th percentile, bigger than about >99.9% of men. That is +6.9 cm against the 13.1 cm average.
How it compares
A 20 cm average lines up with these national figures most closely:
National averages are self-reported and rough, so treat them as context, not fact.
How this is measured
These figures use bone-pressed length, measured from the pubic bone, the way the reference nomograms were taken. Measured without pressing into the fat pad, the same erection reads about 19 cm. Girth is measured around the thickest part of the shaft.
Common questions
What percentile is a 20 cm penis?
It lands at the >99.9th percentile of erect length, bigger than roughly >99.9% of men, against the Veale 2015 mean of 13.1 cm.
How many men are bigger than 20 cm?
About <1 in 1000 men are longer. Out of 100 men, about 0 would be above 20 cm (7.9 in).
Is 20 cm big?
It is +6.9 cm against the 13.1 cm average, at the >99.9th percentile, so <0.1% of men are longer.