By the WHO growth reference, boys who have just turned 11 have a median height of 143.1 cm (4′8″). Most children (94%) are between 130.5 cm (4′3″) and 155.8 cm (5′1″).
143.1 cm (4′8″)
median height (P50)
130.5–155.8 cm
P3–P97 range
| Age | P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|---|
| 11 years | 130.5 | 136.1 | 143.1 | 150.1 | 155.8 |
| 11 years 3 months | 131.7 | 137.5 | 144.5 | 151.6 | 157.4 |
| 11 years 6 months | 133 | 138.8 | 146 | 153.1 | 159 |
| 11 years 9 months | 134.3 | 140.3 | 147.5 | 154.8 | 160.7 |
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 |
|---|---|
| 125 cm (4′1″) | 0.4% |
| 130 cm (4′3″) | 3% |
| 135 cm (4′5″) | 11% |
| 140 cm (4′7″) | 32% |
| 145 cm (4′9″) | 61% |
| 150 cm (4′11″) | 85% |
| 155 cm (5′1″) | 96% |
| 160 cm (5′3″) | 99.4% |
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.