Size
Circumference of
43 [46, 50, 53, 57] cm (17 [18, 20, 21, 22] inch to fit
Toddler [Child, Teen or adult small, adult medium, adult large]
13 repeats = 43 cm (17 inch)
14 repeats = 46 cm (18 inch) child
15 repeats = 50 cm (20 inch) teen or small adult
16 repeats = 53 cm (21 inch) adult medium
17 repeats = 57 cm (22 inch) adult large