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Self-Reported Erections

The use of self-reported measurements of erect penile length.

Fact-Checks

2 results
Jan 28, 2026
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How reliable are stretched‑penis measurements as predictors of true erect length?

(commonly stretched penile length, SPL) correlate with erect length in some studies but are only a moderately reliable predictor overall: finds stretched/flaccid measures typically underestimate erect...

Jan 15, 2026
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Which scientific studies measure erect penis length and how were they conducted?

Multiple systematic reviews and large empirical studies show that erect penile length has been measured in a mix of clinical and self-report settings, with most high-quality papers finding mean erect ...