Garb Infant Size Chart

How to measure: body measurements in inches, over light clothing. Chest/Bust — around the fullest part, tape level. Waist — around the natural waistline. Hip — around the fullest part. Between sizes? Size up.

Size	Age (months)	Chest	Hips	Height
3M	0–3	19	17.5	18–23
6M	3–6	20	18.5	23–27
12M	6–12	21.5	20.5	27–29
18M	12–18	23	21.5	29–31

Boys. Age equals size.

Source: Garb size guide