While most girls reach their full height by age 18, it's not unusual for some to continue growing slightly afterwards.
The growth plates in bones, responsible for bone growth, typically close between ages 16 and 18 for girls. However, this is not a fixed rule, and some girls might still experience a slight increase in height after this period.
Factors such as genetics, nutrition, and overall health can influence how long a girl continues to grow.
If you're concerned about your height or growth, it's always best to consult with a doctor or healthcare professional for personalized advice.