Penis size

An American doctor did some research and found that the normal floppy size for

10 year olds is 4-8 cms,
for 12 year olds is 5-10 cms,
for 14 year olds is 6-14 cms,
for 16 year olds is 10-15 cms,
for 18 year olds is 11-17 cms.

However, he also found that however small the floppy size is, over 90% of men grow to between 14-18 cm when erect.