· Your child reached the top weight or height allowed for their convertible car seat with a harness. (These limits are listed on the seat and also included in the seat’s user guide.)
· Your child’s shoulders are above the top harness slots in their forward-facing seat.
· Your child’s ears have reached the top of their forward-facing seat.
· If your kid is a wiggle worm or sleeps often in the vehicle, then the booster seat may not be an appropriate selection just yet.