Tanner I

No pubic hair at all (prepubertal) (typically age 10 and younger).

Tanner II

A small amount of long, downy hair with slight pigmentation at the base of the penis and scrotum (males) or on the labia majora (females) (10–11.5).

Tanner III

Hair becomes more coarse and curly and begins to extend laterally (11.5–13).

Tanner IV

Adult–like hair quality, extending across pubis but sparing medial thighs (13–15).

Tanner V

Hair extends to medial surface of the thighs (15+).