Split Sizing Size Chart

Size	Age Range	Height	Weight	Chest	Waist
NB	Newborn	Up to 21 in	5–8 lbs	15 in	15 in
0–3M	0–3 months	21–24 in	8–12 lbs	16 in	16 in
3–6M	3–6 months	24–27 in	12–16 lbs	17 in	17 in
6–9M	6–9 months	27–29 in	16–20 lbs	18 in	18 in
12M	9–12 months	29–31 in	20–23 lbs	19 in	18.5 in
18M	12–18 months	31–33 in	23–27 lbs	20 in	19 in
24M / 2T	18–24 months	33–35 in	27–30 lbs	21 in	20 in
2T / 3T	2–3 years	35–38 in	30–34 lbs	21.5 in	20.5 in
4T / 5T	4–5 years	39–44 in	35–42 lbs	23 in	21.5 in
4/5	4–5 years	40–45 in	38–45 lbs	23–24 in	21–22 in
6/7	6–7 years	46–51 in	46–60 lbs	25–26 in	22–23 in
8/10	8–10 years	52–55 in	61–80 lbs	27–29 in	23–25 in
12/14	11–12 years	56–61 in	81–105 lbs	30–32 in	25–27 in
14/16	13–14 years	62–65 in	106–125 lbs	33–35 in	27–29 in