Size Guide

 Size

Weight

Length

Chest

NB (newborn) under 7lbs
0-3M 7-12lbs 18-23" 16-17"
3-6M 12-17lbs 23-27" 17-18"
6-12M 17-22lbs 27-29" 18-19"
12-18M 22-27lbs 29-31" 19-20"
18-24M 27-30lbs 31-33" 20-20.5"