Girls usually stop growing in height around ages 14–16, and most are fully grown by about 16–18 years old.

Typical age range

  • Many girls reach their final height about 2–3 years after their first period, which often works out to around 14–15 years old.
  • Some keep growing a little longer, so “normal” for height to stop is roughly mid‑teens up to about 16–18 years.

What happens around the first period?

  • Height grows fastest in the year or so just before the first period, then slows down a lot afterward. Most girls gain only a few more centimeters after that.
  • Once the bone growth plates in the legs and spine close, vertical growth essentially stops. This closure usually finishes in the mid‑teen years.

Why it’s different for everyone

  • Genetics, nutrition, overall health, and how early or late puberty starts all affect when a girl stops growing.
  • A few girls may see very small extra height changes into the late teens, but these are usually minor.

Signs growth is nearly done

  • More than about 2 years since the first period.
  • Breasts and body hair look fully developed and haven’t changed much recently.
  • Height has barely changed over a year (or only a few millimeters).

Meta description: Wondering how old girls are when they stop growing? Most girls finish height growth around 14–16, with small variations up to 18, depending on puberty timing, genetics, and health.

Information gathered from public forums or data available on the internet and portrayed here.