Sirona G i-Size 360° Rotating Toddler Car Seat


A rear-facing car seat that’s built to protect, with 50% higher safety levels¹. The Sirona G i-Size 360° Rotating Toddler Car Seat has 360° rotation making on-boarding so simple. Integrated Linear Side-Impact Protection and all-round ventilation keep your child safer and cooler.


    • Age range: From approx. 3 months up to 4 years (from birth with newborn inlay)
    • Child height: 61 - 105 cm (from 40 cm with newborn inlay)
    • Child weight: Max. 19 kg
    • Approval regulation: UN R129/03

360° Comfort and Safety

Say hello to rear-facing travel with the CYBEX Sirona G i-Size 360° Rotating Toddler Car Seat, with up to 50% higher safety levels¹ for your child. The innovative 360° rotation makes on and off-boarding so much simpler for parents as the child is placed in a much more manageable position. Once on-board they will be cool and comfortable whatever the weather, with an all-round ventilation system with special mesh fabric increasing breathability by a factor of six². A cleverly integrated Linear Side-Impact Protection System gives streamlined, reinforced protection in the event of a side collision. As part of the Modular G family, the base you had for the Cloud G i-Size fits perfectly to this seat: continuous safety for the first four years.

Care instructions:

  • Fabric covers machine washable at 30° C

Compatible with:

    • Base G
    • Car Seat Cup Holder
    • Sirona G Line Newborn Inlay
    • Sirona G Line Summer Cover
    • SensorSafe 4-in-1 Kit Toddler
  • ISOFIX Guides

¹ Compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2022 ADAC frontal crash test criteria.
² Compared to conventional car seat covers.

Up to 50% higher safety levels

Rear-facing travel is compulsory until your child is 15 months old. The Sirona G i-Size provides up to 50% higher safety levels in its rear-facing position¹. In the event of a front impact, the child's body is pushed against the padded car seat shell, minimising movement and reducing the forces on the neck. A safe position you can count on until your child is 4 years old.

Easy on and off-boarding

An innovative 360° rotation mechanism makes it so easy to get your child in just the right position to get them in or out of the car, even when the seat is reclined. Swivel the seat with one hand: much faster and so much better for your back.

One base – two seats: Designed to cover their first 4 years

As part of the Modular G Family, the Cloud G i-Size and Sirona G i-Size both fit onto the Base G. Once your child has outgrown the baby car seat, the Sirona G i-Size installs on the base with just one click. Thanks to ISOFIX installation, it is a user-friendly, safe foundation for the first four years.

710 mm
440 mm
750 mm
Weight with Base G
13 kg