By the WHO growth reference, boys who have just turned 10 have a median height of 137.8 cm (4′6″). Most children (94%) are between 125.8 cm (4′2″) and 149.8 cm (4′11″).
137.8 cm (4′6″)
median height (P50)
125.8–149.8 cm
P3–P97 range
| Age | P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|---|
| 10 years | 125.8 | 131.2 | 137.8 | 144.4 | 149.8 |
| 10 years 3 months | 126.9 | 132.4 | 139.1 | 145.8 | 151.2 |
| 10 years 6 months | 128.1 | 133.6 | 140.4 | 147.2 | 152.7 |
| 10 years 9 months | 129.2 | 134.9 | 141.7 | 148.6 | 154.2 |
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 |
|---|---|
| 120 cm (3′11″) | 0.3% |
| 125 cm (4′1″) | 2% |
| 130 cm (4′3″) | 11% |
| 135 cm (4′5″) | 33% |
| 140 cm (4′7″) | 64% |
| 145 cm (4′9″) | 87% |
| 150 cm (4′11″) | 97% |
| 155 cm (5′1″) | 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.