Baby Sleep Sacks
US Size Age Baby Height (in) Baby Weight (lbs)
0-3M 0–3 months 19–23 6–13
3-6M 3–6 months 23–26 13–18
6-12M 6–12 months 26–30 18–24
12-18M 12–18 months 30–33 24–28
18-24M 18–24 months 33–36 28–32
Baby Pajamas
US Size Age Chest (in) Height (in) Weight (lbs)
NB Newborn 16–18 18–21 5–8
3M 3 months 18–20 21–24 8–12
6M 6 months 20–22 24–27 12–16
9M 9 months 22–23 27–29 16–20
12M 12 months 23–24 29–31 20–24
18M 18 months 24–25 31–34 24–27
24M 24 months 25–26 34–36 27–30
Toddler Pajamas
US Size Age Chest (in) Height (in) Weight (lbs)
2T 2 years 26–27 35–37 28–32
3T 3 years 27–28 38–40 32–36
4T 4 years 28–29 41–43 36–40
5T 5 years 29–30 44–46 40–45
Kids Pajamas
US Size Age Chest (in) Height (in) Weight (lbs)
6 6 years 30–32 47–49 45–50
7 7 years 32–33 50–52 50–56
8 8 years 33–35 53–55 56–64
10 10 years 35–37 56–59 64–74
12 12 years 37–39 60–63 74–84

* All measurements are in inches and pounds. Measure baby/child without shoes and light clothing.
* If your child is between two sizes, we recommend sizing up for extra room and comfortable sleep.
* Sleep sack fit: shoulder fit is key; loose around neck is not safe. Fabric stretch varies slightly.
* Our pajamas follow US flame-resistant safety standards for children’s sleepwear.