all brands

car seat type age weight height
Infant newborn and infant up to 35 lbs up to 32"
Convertible newborn, infant, and toddler up to 65 lbs up to 50"
Harness Booster toddler and child up to 120 lbs up to 57"
Highback/Belt-Positioning Booster child up to 100 lbs up to 57"
Backless Booster child up to 110 lbs up to 57"

NHTSA Recommended Guidelines