In a normal adult man, it weighs two thirds of an ounce [20 g] and measures, at most, 1.6 inches [4 cm] along its transverse axis, 1.2 inches [3 cm] along its vertical axis, and 0.8 inches [2 cm] along its horizontal axis.
Täiskasvanud terve mehe eesnääre kaalub umbes 20 grammi ning selle maksimaalseteks normaalmõõtmeteks peetakse: laius 4, kõrgus 3 ja paksus 2 sentimeetrit.