Men in general are concerned about "where" the length of their penis once found, will produce inferiority complex.

In fact, the man's penis and body height, weight, facial features, like the size, there are many differences.

In 1950, the country was measured penis size 1412 cases of healthy young men.

The results showed that when normal up to 14.5 cm, 4 cm minimum, average 8.375 cm; 8.3 cm average Zhou Chang; erectile average of 12 cm.

This became the basis for the domestic digital divide condom manufacturers models.

In 1990, experts of the 2547 cases of 16-40 year-old male college student penis measured the length of an average of 7.43 cm, 8.17 cm Perimeter are; average 13.34 centimeters when erect.

Research also pointed out that

Chinese male penis average length of 8.08 cm, 8.11 cm Zhou Chang, erectile average effective length of 12.4 cm.

The measurement results with the selected measurement methods have a certain relationship, and therefore, only as a reference. Further, in the same normal individual penis length is not constant, such as stress, cold or shortening of the penis can be severe fatigue.

Clinically, the penis before puberty shorter than 2.5 cm, shorter than 5 cm after puberty, and growth is not normal, no erectile function;

while secondary sexual characteristics dysplasia, sexual dysfunction, should be deemed penis growth is not normal.