Size	Age Range	Height (in)	Weight (lbs)
NB	Newborn	18–21 in	up to 8 lbs
0–3M	0–3 Months	21–24 in	8–12.5 lbs
3–6M	3–6 Months	24–26 in	12.5–16.5 lbs
6–12M	6–12 Months	26–29 in	16.5–20.5 lbs
12–18M	12–18 Months	29–31 in	20.5–24.5 lbs
18–24M	18–24 Months	31–33 in	24.5–28 lbs

 

How to choose your size:
Pick the size that most closely matches your baby’s current length and weight. If your baby is between sizes or you want longer wear time, sizing up is a good choice.

Babies grow fast. Many sizes fit for only about 2–4 months before it’s time to size up which is exactly why our capsules are structured the way they are.

Not all babies are the same. These ranges are industry averages. If you’re between sizes, many parents size up for longer wear.

Designed to match growth stages. Our capsules align with typical developmental phases so you don’t overbuy or guess.