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Group 2/3 Car Seats (4-12 Years)

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11 products
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Black belted booster seat with padded headrest, armrests, and green side belt guides Black belted booster seat with padded headrest, armrests, and green side belt guides
Sold out

For Your Little One

For Your Little One Stepup I-Size Belted 2/3 Car Seat Booster Seat - Slate Mist (4-12 Years)-Grade A Return

£30.00
£30.00 -57%
£69.99
5.0
(49 reviews)
Black booster car seat with green belt guides, StepUp label shown from multiple angles Black booster car seat with green belt guides, StepUp label shown from multiple angles

For Your Little One

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

£49.99
£49.99 -37%
£79.99
5.0
(67 reviews)
Latte beige I-Size belt booster seat with headrest, side wings, and harness Latte beige I-Size belt booster seat with headrest, side wings, and harness
Sold out

For Your Little One

For Your Little One Stepup I-Size Belted 2/3 Car Seat Booster Seat - Latte Beige (4-12 Years)

£34.99
£34.99 -50%
£69.99
5.0
(69 reviews)
Blush rose 2/3 booster car seat with headrest, armrests, and green belt guides Blush rose 2/3 booster car seat with headrest, armrests, and green belt guides
Sold out

For Your Little One

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

£34.99
£34.99 -50%
£69.99
5.0
(25 reviews)
Black high-back car seat with padded headrest, side wings, and green adjustment pads Black high-back car seat with padded headrest, side wings, and green adjustment pads

For Your Little One

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

£49.99
£49.99 -37%
£79.99
5.0
(57 reviews)
Blush rose high-back booster car seat with padded headrest and side armrests Blush rose high-back booster car seat with padded headrest and side armrests
Sold out

For Your Little One

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
5.0
(24 reviews)
Belted booster car seat set with headrest, side wings, and green belt guides Belted booster car seat set with headrest, side wings, and green belt guides
Sold out

For Your Little One

For Your Little One Stepup I-Size Belted 2/3 Car Seat Booster Seat - Midnight Black (4-12 Years)

£34.99
£34.99 -50%
£69.99
5.0
(38 reviews)
A beige StepUp car seat shown from multiple angles on a white background, with small teal side-release buttons and printed branding including 'For You Little One' and 'StepUp'. A beige StepUp car seat shown from multiple angles on a white background, with small teal side-release buttons and printed branding including 'For You Little One' and 'StepUp'.

For Your Little One

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

£49.99
£49.99 -37%
£79.99
5.0
(33 reviews)
Blush rose 2/3 booster car seat with headrest, armrests, and green belt guides Blush rose 2/3 booster car seat with headrest, armrests, and green belt guides
Sold out

For Your Little One

For Your Little One Stepup I-Size Belted 2/3 Car Seat Booster Seat - Blush Rose - Grade A

£30.00
£30.00 -57%
£69.99
Black high-back car seat with padded headrest, side wings, and green adjustment pads Black high-back car seat with padded headrest, side wings, and green adjustment pads
Sold out

For Your Little One

For Your Little One Stepup I-Size Isofix 2/3 Car Seat Booster Seat - Midnight Black (4-12 Years-Grade A Return)

£45.00
£45.00 -43%
£79.99
Latte beige I-Size belt booster seat with headrest, side wings, and harness Latte beige I-Size belt booster seat with headrest, side wings, and harness
Sold out

For Your Little One

For Your Little One Stepup I-Size Belted 2/3 Car Seat Booster Seat - Latte Beige - Grade A Return

£30.00
£30.00 -57%
£69.99
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Group 2/3 Car Seats (4-12 Years)
Group 2/3 Car Seats (4-12 Years)
Explore the range

Discover Group 2/3 Car Seats (4-12 Years)

Group 2/3 Car Seats for Children Aged 4–12 Years

When your child outgrows their Group 1 seat, a Group 2/3 car seat keeps them safe, comfortable, and correctly restrained all the way through to 12 years old. Our curated range covers children weighing 15–36 kg, offering the perfect blend of safety, longevity, and everyday practicality.

Why Choose a Group 2/3 Car Seat?

  • Long-lasting value – one seat that grows with your child from around age 4 right through to 12
  • High-back booster protection – side wings and head restraints provide crucial side-impact protection
  • ISOFIX & belt-fit options – choose the installation method that suits your vehicle
  • Adjustable headrests & harnesses – grow-with-me features ensure a safe, snug fit at every stage
  • Breathable, washable fabrics – easy to keep clean on long journeys

Safety Standards You Can Trust

All seats in our Group 2/3 range meet current UK and EU safety regulations, including ECE R44/04 and the latest i-Size (R129) standards where applicable. Look for the approval label on every seat for complete peace of mind.

Finding the Right Seat

The best Group 2/3 seat depends on your child's height and weight, your car's ISOFIX points, and how often you travel. Our team is on hand to help — browse the range below or get in touch for personalised advice.

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Need to know

Frequently asked questions

Helpful answers to some of the questions our customers ask most often.

A Group 2/3 car seat is designed for children weighing 15–36 kg, typically aged 4 to 12 years. Group 2 covers 15–25 kg and uses a high-back booster with a vehicle seatbelt, while Group 3 covers 22–36 kg and can be used as a backless booster. Many seats span both groups, offering excellent long-term value as your child grows.
Your child is ready to move to a Group 2/3 seat when they have outgrown their Group 1 seat — usually when they exceed the maximum weight limit (typically 18 kg) or their head rises above the top of the seat. Always check the manufacturer's guidelines and never rush the transition; a well-fitting Group 1 seat is always safer than moving up too early.
ISOFIX is not mandatory for Group 2/3 seats, but it is recommended where available. ISOFIX anchors the seat securely to your car's chassis, reducing the risk of incorrect installation. Belt-fit Group 2/3 seats are also safe when fitted correctly and are a great option for vehicles without ISOFIX points. Check your vehicle handbook to confirm compatibility before purchasing.
Still have a question? Our customer care team is here to help.

Helpful advice

Group 2/3 Car Seats (4-12 Years) Buying Guides

Helpful guides to make choosing the right products for your little one a little easier.

Group 2/3 Car Seats: Booster Fitting & Everyday Belt Checks 01

Buying guide

Group 2/3 Car Seats: Booster Fitting & Everyday Belt Checks

Check booster installation, headrest adjustment, belt routing, retraction and posture, with practical guidance for different vehicles and everyday ...

Read the guide →
Group 2/3 Car Seats: High-Back Booster or Booster Cushion? 02

Buying guide

Group 2/3 Car Seats: High-Back Booster or Booster Cushion?

Compare high-back boosters and booster cushions by approved size range, belt positioning, head support, posture and vehicle fit before choosing.

Read the guide →
Group 2/3 Car Seats (4-12 Years) Buying Guide: Fit & Features 03

Buying guide

Group 2/3 Car Seats (4-12 Years) Buying Guide: Fit & Features

Choose a Group 2/3 car seat by checking booster readiness, the approved size range, vehicle-belt fit, headrest adjustment and vehicle compatibility.

Read the guide →
Helpful advice from For Your Little One Swipe to explore more buying guides