Average wrist circumference, by age

Age (years)	Girls	Boys

Age (years)	mm
8	137.21	144.39
9	144.68	147.91
10	146.94	150.82
11	150.70	155.71
12	153.57	161.06
13	155.70	166.01
14	154.91	167.90
15	153.64	166.96
16	152.81	165.98
17	153.36	169.76
18	151.61	169.59
19	153.57	160.61
Notes: The wrist circumference was measured in millimetres and not in centimetres like the other body measurements. There are too few students below 8 years of age or older than 19 to calculate a meaningful average for these groups. Source: Census at School – Canada, 2005/2006.