Which car seat-need a narrow high back booster(5 year old)

[Snowflakes1122]

Looking for a high back booster for my soon to be 5 year old.
Needs to be narrow as have three children.
Ideally isofix.

Any recommendations?

The Britax Adventure is pretty narrow, and it's shape allows easy access to seatbelt buckles when you have two child seats right next to each other.

The Adventure doesn't have ISOFIX, you don't really need it with a high backed booster because all the seat is doing is lifting your child up so that the seatbelt can do its work properly. But Britax do make the Discovery SL which is the same as the Adventure but with ISOFIX.

Thanks. Will take a look at the suggestions you gave!

The Maxi Cosi Rodifix has a narrow base, as do the Kiddy car seats. You may need to mix car seats widths at the top / bottom to get the right mix. Consider what happens as the children grow, as most some expand in some way at the top.