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  • For Your Little One GrowWithMe 0/1/2/3 i-Size Car Seat - Slate Mist (Birth-12 Years)
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For Your Little One

For Your Little One GrowWithMe 0/1/2/3 i-Size Car Seat - Slate Mist (Birth-12 Years)

Good to know One i-Size Seat from Birth to 12 Years
£62.99 £119.99 Save 47% In stock

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Suitable from birth to 36kg (approx. 12 years)

Group 0/1: Birth–18kg (approx. 0–4 years) — Rear & forward-facing with 5-point harness
Group 2: 15–25kg (approx. 4–6 years) — Forward-facing with harness
Group 3: 22–36kg (approx. 6–12 years) — High-back booster mode

Seat Dimensions: (W)44cm x (D)51cm x (H)58cm
Rear-facing up to 105cm child height
1x GrowWithMe 0/1/2/3 i-Size Car Seat (Slate Mist)
1x Newborn Insert
1x User Manual
✔ i-Size (R129) Certified — Latest European safety standard
✔ Extended Rear-Facing up to 105cm for maximum protection
✔ Universal belted installation — no ISOFIX required, fits virtually any car
✔ 5-Point safety harness adjusts as your child grows
✔ One-hand adjustable headrest with 7 height positions
✔ Multiple recline positions for sleeping and sitting comfort
✔ Premium padded, breathable fabrics for long journeys
✔ Machine-washable, removable seat covers
✔ Grows from birth to 36kg (approx. 12 years) — one seat for every stage

Birth to 12 Years Protection in One Premium i-Size Car Seat

The For Your Little One GrowWithMe is the only car seat you'll ever need. This i-Size car seat grows with your child from birth through to 12 years, combining Group 0/1/2/3 functionality with a universal belted installation that fits virtually any vehicle — no ISOFIX required.

Key Safety Features

  • i-Size (R129) Certified — Meets the latest European safety standards for superior impact protection
  • Extended Rear-Facing — Keep your child safer for longer, rear-facing up to 105cm
  • Belted Installation — Universal fit using your vehicle's 3-point seatbelt for compatibility with virtually any car — no ISOFIX required
  • 5-Point Safety Harness — Adjustable system that grows with your child through every stage

Comfort & Convenience

  • Premium padded fabrics with breathable materials for long journeys
  • Multiple recline positions for sleeping and sitting comfort
  • One-hand adjustable headrest with 7 height positions
  • Machine-washable, removable seat covers

Grows With Your Child

  • Group 0/1: Birth to 18kg (approx. 0–4 years) — Rear and forward-facing with 5-point harness
  • Group 2: 15–25kg (approx. 4–6 years) — Forward-facing with harness
  • Group 3: 22–36kg (approx. 6–12 years) — High-back booster mode

Why Parents Choose the GrowWithMe

One premium seat instead of multiple car seats as your child grows — saving you money and reducing waste. The belted installation means it's compatible with virtually any vehicle using a standard 3-point seatbelt, with no ISOFIX anchors needed. The sophisticated Slate Mist finish complements any vehicle interior.

Suitable from birth to 36kg (approximately 12 years)

Gray convertible car seat with 5-point harness pads and adjustable headrest, multiple views
For Your Little One GrowWithMe 0/1/2/3 i-Size Car Seat - Slate Mist (Birth-12 Years)
£62.99
£62.99 -47%
£119.99
Supporting families since 2011
Trusted by families across the UK
Read our customer reviews on Trustpilot

Trusted by UK families

A safe and reliable place to shop for little ones

Free UK Delivery

On UK mainland orders over £49.99

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.

All‑in‑One Safety from Birth to 12 Years
01

All‑in‑One Safety from Birth to 12 Years

This innovative car seat grows with your child from newborn through to around 12 years old (up to 36 kg), replacing the need for multiple seats as they develop. It’s designed to adapt across all key stages of childhood for long‑lasting use.
For Your Little One GrowWithMe 0/1/2/3 i-Size Car Seat - Slate Mist (Birth-12 Years)
02

Universal Belted Installation — Fits Any Car

The GrowWithMe uses your vehicle's standard 3-point seatbelt for a secure, universal fit — no ISOFIX anchors required. This makes it compatible with virtually any car, giving you flexibility whether you're at home or travelling.
Comfort & Convenience All the Way
03

Comfort & Convenience All the Way

With premium padding, breathable fabrics, multiple recline positions and a one‑hand adjustable headrest, comfort is covered for every journey.
Designed for family life Comfort & practicality Made for everyday adventures

Customers praised this i-Size car seat for being "sturdy without feeling bulky" with excellent build quality and comfort. Shoppers appreciate that it grows with the child from birth to 12 years, eliminating the need to purchase multiple seats. Reviews highlight its secure seat belt installation, supportive padding for long journeys, and great value.

  • Covers all the way through so no need to keep buying car seats as the child grows. Win win!
  • Sturdy without feeling bulky, and the cushioning makes it lovely for longer journeys.
  • A really good seat for the price. It feels well built, secure and comfortable.
  • 5 stars: 27 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
E
Emma T.
Excellent car seat

Very impressed with this car seat. It feels strong, comfortable and reassuring once secured with the seat belt.

O
Olivia M.
Really good seat

This is such a good car seat for everyday use. It is comfortable for my child and feels very well made.

L
Lily N.
Highly recommend

Really like this car seat. It is sturdy without feeling bulky, and the cushioning makes it lovely for longer journeys.

S
Sophie R.
Very impressed

Really pleased with the GrowWithMe seat. It feels secure, supportive and practical for our daily journeys.

F
Freddie G.
Lovely car seat

A fantastic growing car seat. It feels safe and supportive while still being comfortable for my child.

L
Louise S.
Lovely well made car seat

Lovely well made car seat. Got it so it covers all the way through so no need to keep buying car seats as the child grows. Win win and we got it on offer, well worth the price. Very happy 😊

Hi Louise, we're so pleased to hear you're happy with the GrowWithMe car seat! It's great that it covers your little one as they grow, and we're glad you found a good deal. Thanks for sharing your positive experience!

J
Jack H.
Great quality

A great car seat that feels solid and dependable. My little one seems comfortable and happy in it.

E
Evie A.
Strong and comfortable

So happy with this car seat. The build quality feels excellent and it provides a comfortable, secure seat for every trip.

A
Amelia P.
Love this seat

Love this car seat. It is nicely padded, feels sturdy and gives me confidence when we are travelling.

O
Oscar P.
Perfect for us

This is a brilliant car seat. It feels reliable, comfortable and very secure when installed with the seat belt.

G
Grace L.
Very happy

Very happy with the quality of this seat. It feels safe, comfortable and easy to use with the car's seat belt.

P
Poppy V.
Great everyday seat

Very pleased with the GrowWithMe car seat. It feels sturdy and well padded, and my child is happy sitting in it.

N
Noah W.
Fantastic car seat

This car seat is excellent for growing with your child. It feels supportive and very comfortable on longer trips.

H
Harry C.
Very pleased

The quality of this car seat is really good. It feels strong, comfortable and suitable for everyday family travel.

M
Mia C.
Brilliant car seat

A really good seat for the price. It feels well built, secure and comfortable from the moment it is fitted.

M
Maya E.
Amazing car seat

I would definitely recommend this car seat. It feels secure, well made and comfortable for my little one.

E
Ella B.
Really pleased

We are very pleased with this car seat. It feels robust and my child sits comfortably in it.

T
Theo R.
Really happy with it

Great car seat that feels built to last. My child is comfortable in it and I feel confident using it on every journey.

G
George K.
Comfortable and secure

The seat is fantastic. It feels secure and supportive, and the padding makes journeys much more comfortable.

R
Ruby D.
Secure and comfortable

Very happy with this purchase. The seat feels supportive and secure, with plenty of comfort for my child.

A
Ava S.
Great purchase

Very good car seat and exactly what we needed. It feels sturdy and gives a really secure fit with the seat belt.

A
Arthur M.
Excellent choice

This car seat is really good. It feels solid, comfortable and reassuring when we are out on the road.

L
Leo D.
Excellent quality

I am really impressed by how comfortable this car seat is. It feels strong and well designed for everyday use.

I
Ivy S.
Good quality

Excellent seat for everyday journeys. It feels well constructed and my little one seems very comfortable and settled.

I
Isla F.
Very good seat

Excellent quality car seat. It feels durable, supportive and comfortable for my child, which is exactly what I wanted.

H
Henry T.
Love the GrowWithMe seat

We love this car seat. It feels secure, sturdy and comfortable, and the seat belt installation works well for us.

C
Charlie J.
So impressed

This has been a great choice for us. The seat feels secure in the car and my little one seems very comfortable.

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