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For Your Little One

For Your Little One Stepup I-Size Isofix 2/3 Car Seat Booster Seat - Blush Rose (4-12 Years)

Good to know i-Size ISOFIX Group 2/3 | Secure Click-In Fit | 4–12 Years
£49.99 £79.99 Save 37% In stock

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Suitable for children 100–150cm in height (approx. 4–12 years)

Group 2: 15–25kg (approx. 4–6 years) — Forward-facing
Group 3: 22–36kg (approx. 6–12 years) — High-back booster mode

Installation: ISOFIX — check your vehicle is ISOFIX compatible before purchase
Always check your child's height against the seat's headrest guide before use
1x Stepup i-Size ISOFIX Car Seat (Blush Rose)
1x User Manual
✔ i-Size (R129) Certified — Exceeds current EU safety regulations
✔ Rigid ISOFIX connection — click-in installation eliminates fitting errors
✔ Fits children 100–150cm (approx. 4–12 years) — Group 2 & 3
✔ Deep padded side-impact protection wings
✔ One-hand adjustable headrest — multiple height positions, no tools needed
✔ Premium breathable padding for all-day comfort
✔ Removable, machine-washable seat cover

For Your Little One Stepup i-Size ISOFIX Group 2/3 Car Seat — Blush Rose. Designed to keep your child safe and comfortable from 100 cm to 150 cm (approximately 4 to 12 years), the Stepup i-Size ISOFIX car seat is the last car seat you'll ever need to buy for this stage. Built to the latest UN R129 i-Size safety standard, it delivers superior side-impact protection and a rock-solid ISOFIX connection every single time.

Why Parents Love It

  • i-Size Certified (UN R129) — Exceeds current EU safety regulations for enhanced protection
  • ISOFIX Installation — Rigid, click-in connection eliminates installation errors for total peace of mind
  • Fits 100–150 cm (approx. 4–12 years) — Grows with your child through Group 2 and Group 3 stages
  • Side-Impact Protection — Deep, padded side wings absorb and deflect impact energy away from your child
  • One-Hand Adjustable Headrest — Multiple height positions adapt quickly as your child grows, no tools required
  • Removable, Machine-Washable Cover — Easy to keep fresh and clean
  • Blush Rose Finish — Soft, elegant tone that adds a touch of warmth to any car interior

Safety You Can Trust

The Stepup i-Size meets the stringent UN R129 regulation, which requires extended side-impact testing and a minimum height requirement — giving your child significantly more protection than older Group 2/3 seats. The rigid ISOFIX connection anchors the seat directly to your car's chassis, removing the risk of incorrect belt-only installation.

Comfort for Every Journey

Thick, breathable padding and a one-hand adjustable headrest with multiple height positions mean your child can settle in comfortably whether it's the school run or a long motorway trip.

Specifications

  • Safety Standard: UN R129 (i-Size)
  • Child Height: 100–150 cm
  • Approx. Age: 4–12 years
  • Installation: ISOFIX
  • Facing Direction: Forward-facing
  • Cover: Removable & machine washable
  • Colour: Blush Rose
Blush rose high-back booster car seat with padded headrest and side armrests
For Your Little One Stepup I-Size Isofix 2/3 Car Seat Booster Seat - Blush Rose (4-12 Years)
£49.99
£49.99 -37%
£79.99
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Same-Day Dispatch

Order by 2.30pm for same-day dispatch

Easy Returns

Simple returns for extra peace of mind

Why you'll love it

Designed around family life

Discover the features, thoughtful details and benefits designed to make life with little ones easier.

i-Size Safety That Exceeds the Standard
01

i-Size Safety That Exceeds the Standard

The Stepup i-Size is certified to UN R129 — the latest and most rigorous car seat safety regulation in Europe. Unlike older Group 2/3 seats, i-Size requires mandatory side-impact testing, meaning your child is protected from impacts that traditional standards don't even test for. Paired with rigid ISOFIX connectors, the seat locks directly into your car's chassis for a secure, error-free fit every time you travel.
For Your Little One Stepup I-Size Isofix 2/3 Car Seat Booster Seat - Blush Rose (4-12 Years)
02

Grows With Your Child From 4 to 12 Years

Covering 100 cm to 150 cm in height, the Stepup takes your child through both Group 2 and Group 3 stages in a single seat — no mid-stage upgrades needed. The one-hand adjustable headrest moves in seconds to match your child's growing height, while the deep padded side wings reposition automatically to keep protection exactly where it's needed at every stage.
Comfort Built for Real Family Life
03

Comfort Built for Real Family Life

The breathable, premium-padded cover keeps them cool in summer and cosy in winter — and when it needs a refresh, simply remove it and pop it in the washing machine at 30°C. The soft Blush Rose finish adds a touch of gentle elegance to any car interior, making every journey feel a little more special.
Designed for family life Comfort & practicality Made for everyday adventures

Customers praised this ISOFIX booster seat for being "easy to fit" with "straightforward" instructions. They described it as "sturdy and comfortable," "well made," and "good value for the price." Children are happy sitting in it, especially loving the Blush Rose pink colour. Parents appreciated the secure fit and fast delivery.

  • My daughter loves the pink colour and the seat itself feels sturdy and comfortable.
  • Took very little time to fit and the instructions were straightforward.
  • Very pleased with the seat for the price. It feels much better made than some we looked at.
  • 5 stars: 24 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Amelia C.
Great for school runs

Ideal for everyday school runs. Easy to use and my child is happy sitting in it. Really happy with the pink colour as well as how easy the seat is to fit.

H
Harry M.
Good quality finish

The finish is really nice and it feels well made all round. Happy with the purchase. The pink finish is lovely and the seat feels well made and secure.

J
Jack H.
Easy setup

Took very little time to fit and the instructions were straightforward. Very pleased with the result. The Blush Rose shade is a really pretty pink and it looks even nicer in person.

S
Sophie W.
Easy to use

Nice and straightforward to fit and use. The ISOFIX makes it really easy to get into position. My daughter loves the pink colour and the seat itself feels sturdy and comfortable.

O
Oliver B.
Fast delivery

Ordered in the afternoon and it arrived really quickly. Well packed and the seat was exactly as described when it arrived. The pink Blush Rose colour is really lovely and looks great in the car.

G
Grace T.
Good purchase

Very pleased overall. It arrived quickly, was easy to fit and feels secure. We chose it for the pink colour and are very pleased with the overall seat too.

M
Mia D.
Good value

Very pleased with the seat for the price. It feels much better made than some we looked at.

C
Charlie W.
Solid and comfortable

Easy to get fitted with the ISOFIX and it sits nicely in the car. Feels secure and well made. The Blush Rose pink colour is really nice in person.

I
Isla B.
Really good purchase

Good quality booster seat and it feels secure in the car. Would buy again.

N
Noah E.
Great little booster

A really good booster seat for our needs. Easy to fit and looks good too. The Blush Rose pink colour is really nice in person.

E
Ella J.
Good value for money

Very happy with what you get for the price. Comfortable and sturdy. My little one was very excited about the pink seat and it has been great so far.

G
George W.
Great for daily use

Works really well for everyday journeys and is simple for my child to use. The Blush Rose colour is a lovely soft pink and it looks great once fitted.

T
Thomas E.
Very impressed

Was not expecting it to feel this substantial for a booster seat. Really pleased with it. The Blush Rose pink colour is really nice in person.

P
Poppy G.
Happy with the purchase

Everything went smoothly and the seat is exactly what we needed. Very pleased.

O
Oscar T.
Fast and well packed

Arrived quickly and was well packed. No damage and the seat looks great. The Blush Rose pink colour is really nice in person.

F
Freya H.
Customer service was great

Needed a bit of help with a query and the team were friendly and helpful. The issue was resolved quickly.

H
Henry W.
Exactly as expected

The seat is exactly as described and was easy to fit. Very happy with how it feels in the car. The Blush Rose pink colour is really nice in person.

L
Lily R.
Really pleased

Very happy with the quality and how easy it is to fit. Would definitely choose this style again.

A
Arthur C.
Lovely colour

The Slate Mist colour is really nice and the seat feels great quality. Very happy with it. The Blush Rose pink colour is really nice in person.

I
Isabelle M.
Comfortable and sturdy

A good combination of comfort and sturdiness. Very happy with it.

L
Leo M.
Very good seat

Good quality, comfortable and easy to use. Very happy with this one. The Blush Rose pink colour is really nice in person.

R
Rosie H.
Comfortable booster

My child says it is much more comfortable than the old booster. Very pleased with it.

J
James C.
Happy with it

The seat arrived in perfect condition and was really easy to set up. Looks lovely too. The Blush Rose pink colour is really nice in person.

E
Evie L.
Looks great

Really happy with how it looks in the car. The Slate Mist is a lovely colour and it feels sturdy.

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