MILES BABY size chart:

Size
Age
Height (inches)
Weight (lb)
Chest (inches)
3M
0-3M
20-24
9-13
17
6M
3-6M
24-27
13-16
18
9M
6-9M
27-29
16-19
18.5
12M
9-12M
29-30.5
19-22
19
18M
12-18M
30.5-33
22-25
19.5
24M
18-24M
33-35
25-28
20.5
2
2
33-35
27-30
20.5
3
3
35-38
30-34
21
4
4
38-41
34-38
22
5
5
41-44
38-43
23
6
6
44-47
43-48
24
7
7
47-49
48-53
25