Is my infant/child in the appropriate seat for his/her size?
Each child safety seat is manufactured to accommodate children within specified weigh and height guidelines.  Infants seats fit children up to 20-22 pounds.  Most seats with a harness go up to 40 pounds for the forward-facing child.  Booster seats secure children up to 80-100 pounds.  Children under 13 years of age should ride properly restrained in the back seat.