Women prefer big penises, but not too big. In fact, the returns of a bigger penis start to decline after a flaccid length of 2.99 inches (7.6 cm). However, larger penises were only more attractive on taller men with narrow hips and broad shoulders (V-shaped)\x96and not for shorter men. In other words, if a man is short and pear shaped, a large penis will not increase his attractiveness.