Interactive Tool

Car Seat i-Size & ISOFIX Finder

Filter R129 i-Size car seats by child height, ISOFIX requirements, 360-rotation, and extended rear-facing (ERF) options.

Filter Car Seats by Stage & Feature

Joie Spin 360 i-Size

£199

Child height/age: Birth to 4 yrs (40-105 cm)

✓ R129 i-Size ISOFIX Base Included 360° Swivel

Cybex Anoris T i-Size

£550

Child height/age: 15 mo to 6 yrs (76-115 cm)

✓ R129 i-Size ISOFIX Base Included Forward Facing

Nuna Todl Next

£300

Child height/age: Birth to 4 yrs (40-105 cm)

✓ R129 i-Size Next Base Required 360° Swivel

Maxi-Cosi Cabriofix i-Size

£139

Child height/age: Birth to 12 mo (40-75 cm)

✓ R129 i-Size Seatbelt or ISOFIX Rear Facing

Britax Romer Dualfix M i-Size

£315

Child height/age: 3 mo to 4 yrs (61-105 cm)

✓ R129 i-Size ISOFIX Base Included 360° Swivel

Frequently asked questions about i-Size car seats

What is the difference between R129 i-Size and older R44 car seats?

ECE R129 (i-Size) classifies car seats by the child’s height rather than weight, includes mandatory side-impact testing, and requires children to remain rear-facing until at least 15 months old.

Are 360-swivel car seats compatible with all cars?

Swivel car seats require ISOFIX anchor points in your vehicle. Check that your car model is listed on the manufacturer’s vehicle fitting list before buying.