Measurements:
0-3M width: 8 ½”, length: 14 ½”
3-6M width: 9”, length: 15 ½”
6-12M width: 9 ½”, length: 16 ½”
12-18M width: 10”, length: 17 ½”
18-24M width: 10 ½”, length: 18 ½”
Width measurements indicate the chest width from side to side. Length measurements indicate the length from high point shoulder to hem.