When trying to decide between two sizes, choose the larger size for a better fit.

SizeSize/Age RangeChestHeightWeight
0-6 MonthsNewborn-6 months7.517-24 ins11-14 pounds
6-12 Months6 Months-12 Months925-27 ins15-20 pounds
12-18 Months12 Months-18 Months1027-30 ins21-24 pounds
18-24 Months18 Months-24 Months1130-33 ins25-29 pounds
One Size
2T2 Years1233-3528-30 pounds
3T3 Years1336-3830-33 pounds
4T4 Years1439-4134-39 pounds