Size Chart

 INFANTS (Ninesies/9Zs)
Size Option 1 Age  Height (in) Weight (lbs)
NEWBORN 0-3 Months 18-21 5-9
6M 3-6 Months 22-24 10-16
12M 6-12 Months 25-28 17-20
18M 12-18 Months 29-31 21-24
24M 18-24 Months 32-34 25-27
  INFANTS (Ninesies/9Zs and Lap-Tees)
Size Option 2 Age Weight (lbs)
Preemie/NB Preemie/Newborn up to 7
0-3M 0-3 Months up to 9
3-6M 3-6 Months 10-16
6-12M 6-12 Months 17-20
12-18M 12-18 Months

21-24
18-24M 18-24 Months

25-27
TODDLER (Nine-Tees/9Ts)
Size Option 1 Age  Height (in) Weight (lbs)
2T 1-2 Years 33-35 29-30
3T 2-3 Years 36-38 30-33
4T 3-4 Years 39-41 34-39
5/6T 5-6 Years 42-45 39-49
7 6-7 Years 46-49 50-55
 TODDLER (Nine-Tees/9Ts)
Size Option 2 Age  Chest (cm) Length (cm)
2T 1-2 Years 28 cm 38 cm
3T 2-3 Years 29 cm 41 cm
4T 3-4 Years 30 cm 43 cm
5T 5-6 Years 31 cm 46.5 cm
6T (XS) 6-7 Years 33 cm 49 cm
7 (S)/8 (M) 7-8 Years 36 cm 52 cm