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The process and standards for measuring penis length in clinical studies
Large, clinician‑measured meta‑analyses place the global mean erect penis length at roughly 13 cm (≈5.1 in) and show only small differences across populations; where studies report regional or ethnic ...
Measured studies put the average erect penis length at about 5.1–5.5 inches and the average erect girth at roughly 4.6–4.8 inches (11.66–12.2 cm), and peer‑reviewed analyses show that a 6.3‑inch erect...
measure (circumference) most often with a or paper tape wrapped around the shaft at a defined point—typically the mid‑shaft or base—and sometimes with a semi‑rigid ruler used for length alongside tape...
Clinical research measures penis length and girth using a small set of repeatable techniques—most commonly bone‑to‑tip or skin‑to‑tip length measured with a rigid or semi‑rigid ruler and circumference...
Clinical studies measure penis length and girth using defined states (flaccid, stretched, erect) and tools (rulers, semi‑rigid rulers, tape measures), but methods vary widely and that variability mate...
Clinical studies use a handful of repeatable measurement protocols—flaccid, stretched (SPL), and erect lengths—measured from a proximal landmark to the distal glans tip, but wide methodological variat...