Average length of forearm, by age

Age Girls Boys
cm cm
8 22.70 22.91
9 22.90 22.86
10 22.99 23.30
11 24.01 24.23
12 24.65 25.33
13 25.26 26.24
14 25.30 27.28
15 24.69 27.15
16 25.32 27.75
17 25.59 28.23
18 25.71 28.66
19 25.25 27.89

Source: Census at School Canada, 2012-2013.