By the WHO growth reference, boys who have just turned 6 have a median height of 116 cm (3′10″). Most children (94%) are between 106.7 cm (3′6″) and 125.2 cm (4′1″).
116 cm (3′10″)
median height (P50)
106.7–125.2 cm
P3–P97 range
| Age | P3 | P15 | P50 | P85 | P97 |
|---|---|---|---|---|---|
| 6 years | 106.7 | 110.8 | 116 | 121.1 | 125.2 |
| 6 years 3 months | 108 | 112.2 | 117.4 | 122.6 | 126.9 |
| 6 years 6 months | 109.3 | 113.6 | 118.9 | 124.2 | 128.5 |
| 6 years 9 months | 110.5 | 114.9 | 120.3 | 125.7 | 130.1 |
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 |
|---|---|
| 100 cm (3′3″) | 0.1% |
| 105 cm (3′5″) | 1% |
| 110 cm (3′7″) | 11% |
| 115 cm (3′9″) | 42% |
| 120 cm (3′11″) | 79% |
| 125 cm (4′1″) | 97% |
| 130 cm (4′3″) | 99.8% |
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.