How can I tell if my child is too tall for their Radian® 3R® car seat?

In rear-facing installations, the top of the child's head must be 3.8 cm below the top of the shell. In both forward-facing and booster installations, the child's ears must be below the top of the car seat shell. In forward-facing installations, the harness straps must be above the shoulders.

Click Here for Radian® 3R® manual.

Please watch the video below by our expert CPST for more information about transitioning to a booster: