Most common questions used to investigate
Is Your child under 4ft 9in (145 cm)?
Is your child under 1 years old?
Is your child between 1 and 3 years old?
Is your child between 4 and 7 years old?
Is your child between 8 and 12 years old?
Common conclusions
In general, car seats are recommended for children under 4ft 9in (145cm).
For children under the age of 1 always use a rear facing car seat.
For children between the ages of 1 and 3 use a rear facing car seat for as long as possible until your child reaches the maximum weight or height limit as specified by the car seat manufacturer and then use a forward facing car seat.
For children between the ages of 4 and 7 use a forward facing car seat for as long as possible until your child reaches the maximum weight or height limit as specified by the car seat manufacturer and then use a booster car seat.
For children between the ages of 8 and 12 use a booster car seat until your child can use the seat-belt properly. Using the seat-belt properly means that the lap belt fits across the upper thigh and the shoulder belt fits across the shoulder and not the neck or face.
If your child is over 12 years old but under 4ft 9in (145 cm) use a booster car seat until your child can use the seat-belt properly. Using the seat-belt properly means that the lap belt fits across the upper thigh and the shoulder belt fits across the shoulder and not the neck or face.
References
https://www.nhtsa.gov/equipment/car-seats-and-booster-seats#age-size-rec
https://my.clevelandclinic.org/health/articles/9690-choosing-a-car-seat
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