By the WHO growth reference, girls who have just turned 12 have a median height of 151.2 cm (5′0″). Most children (94%) are between 138.4 cm (4′6″) and 164.1 cm (5′5″).
151.2 cm (5′0″)
median height (P50)
138.4–164.1 cm
P3–P97 range
| Age | P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|---|
| 12 years | 138.4 | 144.1 | 151.2 | 158.3 | 164.1 |
| 12 years 3 months | 139.7 | 145.5 | 152.7 | 159.8 | 165.6 |
| 12 years 6 months | 141 | 146.8 | 154 | 161.2 | 167 |
| 12 years 9 months | 142.2 | 148.1 | 155.2 | 162.4 | 168.3 |
P50 is the median: half of children the same age are shorter and half taller. P3 to P97 is the range WHO treats as normal.
| Height | Children shorter |
|---|---|
| 135 cm (4′5″) | 0.9% |
| 140 cm (4′7″) | 5% |
| 145 cm (4′9″) | 18% |
| 150 cm (4′11″) | 43% |
| 155 cm (5′1″) | 71% |
| 160 cm (5′3″) | 90% |
| 165 cm (5′5″) | 98% |
| 170 cm (5′7″) | 99.7% |
Values come straight from World Health Organization tables: the WHO Child Growth Standards (2006) for ages 0–5 and the WHO Growth Reference (2007) for ages 5–19. National references (CDC in the US, for example) can differ by a few centimetres. This is not a diagnostic tool: growth over time matters more than a single measurement, and questions about your child's growth belong with their doctor.