In how short of a time can one grow one inch during puberty?
I don't recall reading any definitive statement on this. Generally growth is measured in the rate of growth over a year's period. Typically a child grows between 2 and 3 inches each year, though during the early years it the rate is higher. A baby typically grows about 10 inches in the first year of life. During stage 3
of development the rate typically jumps to 3 to 6 inches per year, though the actual length of rapid growth may not last an entire year. In stage 4
it quickly declines and by the time you reach stage 5
it has stopped.