How long does a human grow?

Humans typically grow in height until their late teens to early twenties, with most girls reaching their full height by around 16-18 years and boys by around 18-21 years. Growth occurs most rapidly during infancy and puberty, when significant hormonal changes stimulate growth spurts. After this period, growth plates in the bones close, marking the end of vertical growth. Overall, the growth phase lasts for about 15-20 years.