Knowledge Center Ages, Stages, & Fit
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Ages, Stages, & Fit

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Here you’ll find everything from car seat and stroller basics to Britax product information and how-to guides. Choose a category to start browsing our articles and videos.

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Ages, Stages, & Fit

5 Resources Available
A child in car seat and a child in a booster seat.
Ages, Stages, & Fit

Navigating the Next Step: A Guide to Booster Seats

Get ready for your big kid’s transition to a booster seat. 

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A child standing next to measuring lines on a wall.
Ages, Stages, & Fit

More to Measure: Shoulder Level and Ear Level in Forward-Facing Harnessed Car Seats

Learn about the importance of car seat harness strap positioning and ear-to-headrest positioning.

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Two children safely buckled in forward-facing car seats next to a third rear-facing car seat.
Ages, Stages, & Fit

When Should I Turn My Child Forward-Facing in a Car Seat?

Get tips and recommendations for when you should switch from rear-facing to forward-facing.

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Girl sitting in Highpoint booster in backless mode
Ages, Stages, & Fit

Does Your Child Pass the 5-Step Test?

Find out if your child is ready to graduate out of their booster.

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A woman is standing by the open back door of a car, adjusting a forward-facing car seat that is installed in the back seat. 
Ages, Stages, & Fit

Adjusting and Tightening the Harness

Tips for adjusting harness straps and why proper fit matters for safety.

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