# Maxi-Cosi Tanza i-Size Foldable Booster, 100–150cm

Source: https://www.ranked10.co.uk/home/best-isofix-car-seats/maxi-cosi-tanza-i-size
Ranked #5 in "Best ISOFIX Car Seats 2026: 10 Ranked, and the Spec Fields That Fight the Copy": https://www.ranked10.co.uk/home/best-isofix-car-seats

- Price: £79.99 (checked on Amazon UK on 2026-09-16)
- Amazon rating: 4.3 from 1,425 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0CZ47FKZL?tag=ranked10-21

The Maxi-Cosi Tanza i-Size is a forward-facing high-back booster for children between 100 cm and 150 cm, which Maxi-Cosi gives as roughly 3.5 to 12 years and 15 to 36 kg. It sits at number five in our guide to ISOFIX car seats, at £79.99, with 4.3 out of 5 from 1,425 Amazon ratings.

What stands out here is not the seat but the paperwork around it. The second bullet promises "secure ISOFIX attachments", while the specification table directly underneath lists the installation type as "Seat Belt". The same table carries a "Rear Facing Maximum Weight" of 36 kilograms on a seat the bullets describe as forward-facing. Everything on this page is taken from the Amazon listing — we have not fitted, handled or crash-tested the seat ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £79.99 |
| Amazon rating | 4.3 out of 5 from 1,425 ratings |
| Installation type (as listed) | Seat Belt |
| Orientation (as listed) | Forward Facing |
| Rear facing maximum weight (as listed) | 36 Kilograms |
| Size and age range | 100–150 cm, approx. 15–36 kg, 3.5–12 years |
| Folded dimensions (as listed) | 59.5 x 28 x 45 cm |
| Item weight | 5.32 kg |

## Questions people ask

**How is the Maxi-Cosi Tanza i-Size installed?**

The listing gives two answers. The specification table states "Installation Type: Seat Belt", while the second bullet describes "secure ISOFIX attachments" built to i-size ECE R129. The listing does not reconcile the two.

**What size child does the Maxi-Cosi Tanza i-Size fit?**

100–150 cm, given as approximately 15–36 kg and 3.5 to 12 years. Maxi-Cosi describes it as a Group 2/3 forward-facing car seat.

**Does the Maxi-Cosi Tanza i-Size fold?**

Yes. The listing quotes a compact folded size of 59.5 cm x 28 cm x 45 cm and a weight of 5.32 kg.

**How many headrest positions does the Maxi-Cosi Tanza i-Size have?**

Ten, adjustable in height as the child grows.

**What is the Maxi-Cosi Tanza i-Size rated?**

4.3 out of 5 from 1,425 Amazon customer ratings.

**Does the specification table describe the Maxi-Cosi Tanza i-Size as rear facing?**

Not as such: "Orientation" reads "Forward Facing". The same table does list a "Rear Facing Maximum Weight" of 36 kilograms, which is not a figure that describes a forward-facing booster.