Children's Health/UT Southwestern

What are typical penis length and girth measurements for newborns, toddlers, and school-age boys?

Typical stretched penile length (SPL) for full‑term newborn boys clusters around 2.8–4.2 cm (1.1–1.6 in) with a commonly used micropenis cutoff near 1.9 cm (0.75 in) or about 2.5 SD below the mean . S...