No shoes, feet together, flat on the floor, measure from the top of the head to the ground.
Measure around the base of the neck where the collar sits.
Place the tape close up to under arms, measure around the chest at the fullest.
Measure around the natural waistline.
Measure around the bottom, at the fullest point.
Measure from the crotch to the ankle bone.
24″ chest = 3-4 yrs
26″ chest = 5-6 yrs
28″ chest = 7-8 yrs
30″ chest = 9-10 yrs
32″ chest = 11-12 yrs
34″ chest = XS
36″ chest = S
38/40″ chest = M
42/44″ chest = L
46″ chest = XL