Tanner staging sexual maturity score

Pubic hair (both male and female)

1. Tanner I -- no pubic hair at all [10 and under] (prepubertal state)
2. Tanner II -- small amount of long, downy hair with slight pigmentation at the base of the penis and scrotum (males) or on the labia majora [10-11](female)
3. Tanner III -- hair becomes more coarse and curly, and begins to extend laterally [12-14]
4. Tanner IV -- adult-like hair quality, extending across pubis but sparing medial thighs [13-15]
5. Tanner V -- hair extends to medial surface of the thighs [16+]

Genitals (male)

1. Tanner I -- prepubertal (testicular volume less than 1.5 ml; small penis of 3 cm or less)
2. Tanner II -- testicular volume between 1.6 and 6 ml; skin on scrotum thins, reddens and enlarges; penis length unchanged
3. Tanner III -- testicular volume between 6 and 12 ml; scrotum enlarges further; penis begins to lengthen to about 6 cm
4. Tanner IV -- testicular volume between 12 and 20 ml; scrotum enlarges further and darkens; penis increases in length to 10cm and circumference
5. Tanner V -- testicular volume greater than 20 ml; adult scrotum and penis of 15 cm in length

Breasts (female)

1. Tanner I -- no glandular tissue; areola follows the skin contours of the chest (prepubertal)
2. Tanner II -- breast bud forms, with small area of surrounding glandular tissue; areola begins to widen
3. Tanner III -- breast begins to become more elevated, and extends beyond the borders of the areola, which continues to widen but remains in contour with surrounding breast
4. Tanner IV -- increased breast size and elevation; areola and papilla form a secondary mound projecting from the contour of the surrounding breast
5. Tanner V -- breast reaches final adult size; areola returns to contour of the surrounding breast, with a projecting central papilla.