By the WHO growth reference, boys who have just turned 4 have a median height of 103.3 cm (3′5″). Most children (94%) are between 95.4 cm (3′2″) and 111.2 cm (3′8″).
103.3 cm (3′5″)
median height (P50)
95.4–111.2 cm
P3–P97 range
| Age | P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|---|
| 4 years | 95.4 | 99 | 103.3 | 107.7 | 111.2 |
| 4 years 3 months | 96.9 | 100.5 | 105 | 109.5 | 113.1 |
| 4 years 6 months | 98.4 | 102.1 | 106.7 | 111.2 | 115 |
| 4 years 9 months | 99.8 | 103.6 | 108.3 | 113 | 116.8 |
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 |
|---|---|
| 90 cm (2′11″) | 0.1% |
| 95 cm (3′1″) | 2% |
| 100 cm (3′3″) | 21% |
| 105 cm (3′5″) | 65% |
| 110 cm (3′7″) | 94% |
| 115 cm (3′9″) | 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.