Graco Junior Maxi i-Size R129 Highback Booster car seat with cupholders, Suitable from 100-150cm (approx. 3.5 to 12 years), M
Product details checked 5 September 2026 · price checked live
Check price on Amazon →Overview
We track Graco Junior Maxi i-Size R129 Highback Booster car alongside 46 other car seats & accessories products, comparing it on rating, how many people have rated it and what it currently costs. According to the listing: Suitable from 100-150cm (3.5 to approx. 12 years). 10-position height-adjustable head rest. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.7 out of 5 from 3,591 ratings. What that score is worth next to its rivals is set out below.
- Brand
- Graco
- Amazon rating
- 4.7 / 5 from 3,591 ratings
- vs Car Seats & Accessories
- 0.1 above the category median of 4.6
- Rank in category
- 6 of 47 rated car seats & accessories we track
- Price position
- Towards the top of the range (category spans £4.59 to £299)
- How proven
- Well established, above-average review volume
Price range as of · details
How it compares in Car Seats & Accessories
Across the 47 rated car seats & accessories products we track, the typical score is 4.6 out of 5. This one sits at 4.7, which is around the middle of the category. Ratings alone will not separate it from its rivals here, so price and the specifics below matter more than the star count.
It carries 3,591 ratings against a category median of 1,160. That is enough of a base to take the score seriously without treating it as settled.
On price it sits in the upper third of a category running from £4.59 to £299, where the midpoint is about £13.59. Paying above the category norm needs a reason beyond the rating, because the score alone does not justify the gap here.
Category prices as of · details
Worked out from the 47 car seats & accessories products in our catalogue, not from the brand's own claims. How we rank →
Key features, as the manufacturer lists them
Taken from the product listing via Amazon's product API. These are the seller's claims, not our test results.
- R129 highback booster car seat - Suitable from 100-150cm (3.5 to approx. 12 years)
- 10-position height-adjustable head rest
- Soft cushioned seatpad
- Retractable cupholders
- Open-loop belt guides to help ensure proper seat belt positioning
