The picture of the mature femur shows that the epiphyses have closed and growth is finished. This happens to girls when they are about 16 to 18 years old and happens to boys when they are about 18 to 22 years old. Grownups cannot get taller, but they do get shorter.

When do femur growth plates close?

Growth plates usually close near the end of puberty. For girls, this usually is when they're 13–15; for boys, it's when they're 15–17.

What age do leg bones stop growing?

Measuring the length of long bones can give an estimate of age for children, but this technique is useful only until bones have stopped growing. The tibia completes growth at about age 16 or 17 in girls, and 18 or 19 in boys. For toddlers to teenagers up to age 21, teeth are the most accurate age indicators.