Size Chart
0-3 mo.	up to 11 lbs	21.5-23"
3-6 mo.	11.5-16 lbs	23.5-25"
6-9 mo.	16.5-20 lbs	25.5-27"
12 mo.	20.5-24.5 lbs	27.5-30"

Size chart is a general guide. It may include sizes that are unavailable for this item.