Size	CM	Inches	Age
C2	10 CM	3.9"	3 – 9M
C3	11 CM	4.3"	6 – 12M
C4	12 CM	4.7"	9 – 12M
C5	12.5 CM	4.9"	12 – 18M
C6	13.5 CM	5.3"	18M – 2.5Y
C7	14 CM	5.5"	18M – 2.5Y
C8	15 CM	5.9"	2.5 – 4Y
C9	16 CM	6.3"	3 – 4Y
C10	17 CM	6.7"	4 – 6Y
C11	17.5 CM	6.9"	5 – 6Y
C12	18.5 CM	7.2"	6 – 6.5Y
C13	19 CM	7.7"	6 – 6.5Y
J1	20 CM	7.9"	6.5 - 7Y
J2	21 CM	8.2"	6.5 - 7Y
J3	22 CM	8.7"	7 - 8Y
J4	23 CM	9.2"	7 - 8Y