Maxi-Cosi Tanza i-Size

Our score 9.69 / 10

Research by Peter Crona Last updated Method How we research

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From 100 cm, up to 150 cm (~3.5-12 years).

Maxi-Cosi Tanza i-Size

Pros

  • Folding design and 100-150 cm booster scope make it easier to move than many larger high-back seats.
  • ISOFIX plus belt use gives a clearer daily setup than very basic belt-only boosters.

Cons

  • Only relevant after the child is tall and mature enough for the booster stage.
  • Check shoulder-belt routing and headrest height in the actual car before relying on it.
Dutch brand
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Booster
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Maxi-Cosi Tanza i-Size makes the most sense if you want a booster that stays compact enough for travel, second cars, or easier storage without dropping into generic no-name territory. The folding design is not a gimmick here. It is one of the main reasons the seat earns a shortlist place. If you want something easier to move and store than a bulkier everyday booster, but still want a known-brand safety story, Tanza has a very clear role.

The tradeoff is that the same compact design also keeps it lighter and a bit less substantial than larger premium boosters. It is still only a booster-stage seat, so it makes sense once your child is genuinely ready for 100-150 cm use and no longer needs a harnessed option. Bought at the right stage, it is a smart compact booster. Bought too early, it solves the wrong problem.