The size 4T in Gap is closest to the following:
Brand Label Weight (lbs) Height (inches)
American Apparel 4 years 35 - 41 lbs 36 - 40 inches
BabyBoden 2-3 years - 35.5 - 38.5 inches
Burt's Bees Baby (Target) 4T 36 lbs 39 - 41.5 inches
Carters 4T 34 - 38 lbs 38.5 - 41.5 inches
Cherokee (Target) 4T 32.5 - 37 lbs 39 - 41.5 inches
Circo (Target) 4T 32.5 - 37 lbs 39 - 41.5 inches
Gap 4T 36 - 40 lbs 39 - 42 inches
Gymboree 4T 35 - 41 lbs 39 - 42 inches
H&M 3-4 years - 41 inches
Hanna Andersson 100cm 31 - 38 lbs 38 - 42 inches
Hatley 4 - 41 inches
J.Crew/ Crewcuts 4 34.5 - 39.5 lbs 39 - 42 inches
LLBean 4 - 38 - 40 inches
Lands End 4T 34 - 38 lbs 39 - 41 inches
Marimekko 4 yrs/104 cm - 41 inches
MiniBoden 4y - 41 inches
Old Navy 4T 36 - 40 lbs 39 - 42 inches
OshKosh 4T 34 - 38 lbs 38.5 - 41.5 inches
Petit Bateau 5Y 32 - 36 lbs 42.5 inches
Ralph Lauren 4 36 - 40 lbs 40 - 42.5 inches
The Children's Place 4T 32 - 35 lbs -
Tucker + Tate (Nordstrom) 4T 34 - 39 lbs 38.5 - 41.5 inches
Wal-Mart 4T 34.4 - 38 lbs 38 - 41.5 inches
Zutano 4T 36 - 40 lbs 39 - 42 inches
childhoods 3T 33 - 36 lbs 36 - 39 inches
janie and jack 4 36 - 40 lbs 40 - 44 inches
tea 4/S 36 - 40 lbs 39 - 42 inches
vineyard vines 4T 36 - 40 lbs 39 - 42 inches