The size 18 months in Carters is closest to the following:
Brand Label Weight (lbs) Height (inches)
American Apparel 12-18m 23 - 27 lbs 29 - 31 inches
BabyBoden 12-18 months 22 - 26.5 lbs 30 - 32.5 inches
Burt's Bees Baby (Target) 18 M 22 - 24 lbs 29.5 - 32.5 inches
Carters 18 months 24.5 - 27.5 lbs 30.5 - 32.5 inches
Cherokee (Target) 18 months 23.5 - 26 lbs 31 - 32.5 inches
Circo (Target) 18 months 23.5 - 26 lbs 31 - 32.5 inches
Gap 12-18 months 22 - 27 lbs 29 - 31 inches
Gymboree 12-18 months 22 - 27 lbs 29 - 31 inches
H&M 9-12 months - 31 inches
Hanna Andersson 80cm 20 - 27 lbs 30 - 34 inches
Hatley 1 - 32 inches
J.Crew/ Crewcuts 12-18 months 22 - 27 lbs 30 - 32 inches
Jumping Bean (Kohl's) 24 months 26 - 29 lbs 31 - 33 inches
LLBean 2T - 33 - 34 inches
Lands End 2T 27 - 29 lbs 33 - 35 inches
Marimekko 12 months/ 80cm - 30 - 33 inches
MiniBoden 1.5 years - 32.5 inches
Old Navy 12-18 months 22 - 27 lbs 29 - 31 inches
OshKosh 18 months 24.5 - 27.5 lbs 30.5 - 32.5 inches
Petit Bateau 24M 24 - 28 lbs 34 inches
Ralph Lauren 18M 25.5 - 27.5 lbs 31.5 - 33 inches
The Children's Place 18-24 months 22 - 28 lbs -
Tucker + Tate (Nordstrom) 18M 25 - 27 lbs 31 - 33 inches
Wal-Mart 18 months 22.5 - 26 lbs 30 - 31.5 inches
Zutano 24m 24 - 29 lbs 33 - 35 inches
childhoods 18-24 months 25 - 30 lbs 31 - 33 inches
janie and jack 12-18 months 22 - 27 lbs 29 - 31 inches
june and january 2T 25 - 27 lbs 33 - 35 inches
tea 12-18 months 22 - 27 lbs 29 - 31 inches
vineyard vines 12-18 months 22 - 27 lbs 30 - 32 inches