Size	Age (approx)	Waist	Thigh
Small	0-3 mths	34-41 cm	17-22 cm
Medium	3-6 mths	37-44 cm	19-24 cm
Large	6-12 mths	40-47 cm	20-26 cm
X Large	1-2 years	42-50 cm	22-31 cm
XX Large	2-3 years	44-52 cm	26-33 cm
XXX Large	3-4 years	48-54 cm	27-35 cm