Average Length for a 11-Month-Old Girl
The average (50th-percentile) length for a 11-month-old girl is 72.8 cm (28.6 in), based on the WHO Child Growth Standards. Across the healthy range, most girls this age measures between 68.0 cm (26.8 in) and 77.5 cm (30.5 in). (length is measured lying down until age 2)
| Percentile | Metric | Imperial |
|---|---|---|
| 3rd | 68.0 cm | 26.8 in |
| 15th | 70.2 cm | 27.6 in |
| 50th | 72.8 cm | 28.6 in |
| 85th | 75.4 cm | 29.7 in |
| 97th | 77.5 cm | 30.5 in |
What's typical at this age
By the first birthday many babies are about 50% longer than they were at birth. Length keeps climbing at around a centimetre a month. Between month 11 and month 12, the median girl grows about 1.2 cm.
A percentile compares your girl to other girls the same age — the 50th is simply the middle. Being above or below it is usually completely normal; a baby who has always tracked the 15th or 85th percentile is typically growing exactly as they should. What pediatricians watch for is a sudden change in the pattern, not the number itself.
See your own baby's percentile
Enter your child's exact weight and height for their personal WHO percentile and growth curve.
Open the Growth Calculator →Percentiles calculated from the WHO Child Growth Standards (2006). For information only — not medical advice. If you're concerned about your child's growth, speak to your pediatrician or health visitor. Full disclaimer.