Sirona G i-Size
- Age 3 mths - approx. 4 yrs
- Weight max. 19 kg
- Regulation UN R129/03
- 61 - 105 cm
- 76 - 105 cm
523001203 (Moon Black (Comfort))
Product Details
Specifications:
- 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 & Safety
Say hello to rear-facing travel with the ADAC awarded CYBEX Sirona G i-Size car seat, with up to 50% higher safety levels¹ for your child. 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'll 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
References
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.



Measurements
- Length
- 710 mm
- Width
- 440 mm
- Height
- 750 mm
- Weight without Base G
- 6.5 kg



What's included?
- Sirona G i-Size toddler car seat
- User guide (Quick-start guide & digital guide access)
Base G
The Sirona G i-Size clicks on and off the Base G. This is installed using a load leg and ISOFIX. The Base G ensures safety and stability, and it can also be used with the Cloud G i-Size infant car seat. Look for the i-Size logo in your vehicle to check compatibility. If there is no i-Size logo but your car has ISOFIX, please check our Car Compatibility tool.