Size Inside circumference
4 1.9" / 4.7cm
5 1.9" / 4.9cm
6 2" / 5.2cm
7 2.1" / 5.5cm
8 2.3" / 5.7cm
9 2.4" / 6cm
10 2.5" / 6.2cm
11 2.6" / 6.5cm
12 2.7" / 6.8cm

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