Average wrist circumference, by age

 

 Age Girls Boys
mm mm
8 or younger 139.2 138.3
9 145.5 146.8
10 145.1 150.3
11 149.4 153.6
12 152.8 156.1
13 153.0 162.4
14 153.7 164.2
15 150.3 164.4
16 148.7 167.7
17 154.5 168.3
18 154.7 166.7
19 or older 146.2 169.9

 

Source: Census at School Canada, 2016-2017