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The child seats and child restraints we use for testing in our car reviews on BabyDrive are to give you a general guide only.

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If you are looking at the car reviews on BabyDrive and wondering if your child's restraint will fit in the car you have, or the car you are looking at buying, then below is a simple guide with the measurements of all the products we use, you can compare them to the measurements of your child seats (these are available on most manufacturers websites).

We hope this helps 🙂

Mountain Buggy Protect Infant Capsule

Measurements : 42cm (L) x 65cm (W) x 35cm (D) / 17.7″ (L) x 26″ (W) x 13.8″(D)

Britax Unity Infant Capsule

Measurements : 43cm (L) x 54.5cm (W) x 47.5cm (D) / 17″ (L) x 21.5″ (W) x 18.7″(D)

Britax Platinum Pro


Rear facing : 60cm – 70cm (H) x 60cm (W) x 38.5cm – 50cm (D) / 23.6″ – 27.6″ (H) x 23.7″ (W) x 15.2 – 19.7″ (D)

Forward facing : 64cm – 81cm (H) x 39cm (W) x 38.5cm – 50cm (D) / 25.2″ – 31.9″ (L) x 15.4″ (W) x 15.2″ – 19.7″ (D)

Britax Graphene


Rear facing : 52cm (L) x 44cm (W) x 37.5cm (D) / 17.3″ (H) x 23.7″ (W) x 14.8″ (D)

Forward facing : 68.5cm (H) x 44cm (W) x 42.5cm (D) / 27″(L) x 23.7″ (W) x 16.7″ (D)

Britax Maxi Guard Pro

measurements : 68cm – 86.5 (H) x 46cm (W) x 50.5cm (D) / 26.8″ – 34.1″  (H) x 18.1″ (W) x 19.9″(D)

Measurements : 75cm – 88cm (H) x 47cm – 57cm (W) x 38cm – 44.5cm (D) / 29.5″ – 34.6″  (H) x 18.5″ – 22.4″ (W) x 15″ – 17.5″ (D)

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Mocka Nursery furniture
Tace Clifford
About Tace Clifford
Tace Clifford founded BabyDrive in 2017 after discovering a huge information gap in mainstream car reviews that left new parents and expanding families in the dark when it came to one of the biggest purchasing decisions of their lives.


  1. Hi,
    I’ve just looked at the BMW X1 review and seen 3 car seats can fit across — with the easier configuration bring two forward-facing and one rear-facing (which is what I’ll need).I’ve looked at your page ‘Will my car seat fit in my car?’

    I have 2 x Britax Kid Guards and 1 x Britax Safe-n-Sound Unity Isofix capsule.

    Do you believe The Unity will fit with the Kid Guards in an X1?

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