15 of the best i-Size car seats for babies and toddlers

Highest-rated i-Size car seats for newborns as tested by our reviewers including models from Britax, Maxi-Cosi, Joie, Kiddy and Cybex

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With the introduction of the new i-Size car seat regulations, we’re seeing more and more i-Size car seats for newborn babies come on to the market – some taking babies through to 4 years. You don’t have to buy an i-Size seat right now as the new laws sit alongside the current ones.

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That means you can still use a non i-Size seat, but buy one now and you’re future-proofing yourself. Plus research shows that sitting your child rear-facing for longer in a car is considerably safer – and that’s one of the benefits of I-Size. 

We’ve answered all your i-Size safety questions below, or you can click here to go directly to the list of the best i-Size car seats.

How much should I expect to pay for an i-Size car seat?

Like all car seats, prices vary. In our top choices, we’ve highlighted car seats that range from £180 (for a seat up to 15 months) to nearly £400 (although that will last until your child is 4). 

Should I buy an i-Size car seat to 15 months or 4 years?

You have two options – the choice is yours depending on what you’d prefer. 

Currently, an i-Size car seat that lasts from birth to 4 years will not be travel system compatible – although we’re sure someone will develop this before long – indeed Recaro has been working on this. So, if you want a car seat that you can attach to your pram, then choose a car seat that takes your child up to 15 months. While that means you’ll have to buy another car seat, both Maxi-Cosi and BeSafe are offering an interesting option – two car seats with one i-Size base. 

Do I have to buy a car seat base with an i-Size car seat?

Yes. For a car seat to be i-Size, it must have ISOFIX fitting. Therefore, to use the car seat as i-Size, you’ll need a base with your seat – although some come with the base included. Bases can be very expensive, so we’ve added the cost of the base to the overall price, so you can see how much you’ll actually pay. And remember, not all i-Size cars fit all ISOFIX cars. Before you buy, you’ll need to check your car’s compatibility with the car seat manufacturer’s fitting guide. Read more: What exactly is i-Size and what do I need to know?

Here are the top 15 baby i-Size car seats according to our reviewers and researchers…

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1. GB Vaya car seat, £375 (base included) – MadeForMums Gold Award Winner

  • Age suitability: Birth to 18kg (around 4 years)
  • Rear-facing until: 4 years
  • Additional cost of ISOFIX base:
  • Total cost from birth to 15 months: from £340
  • Travel system compatible: No

Certified to the i-Size standard, meaning it offers rear-facing to at least 15 months and has additional side impact protection, the GB Vaya car seat also has various safety awards including a ADAC Good test, Oamtc test and Red Dot award.

Suitable from birth to 4 years the GB Vaya is rear-facing for longer, has a 360-degree rotating base, 5-position recline and easy, one-click ISOFIX installation.

And it also has easy to remove, washable covers, for those inevitable messy car moments, one of the reasons it scooped our gold award.

What our MadeForMums judges say about the GB Vaya car seat:

“This is a good quality seat that has been tested to good standards. The older age range of the seat is good and I like the feature that prevents using forward facing too soon,” Child car seat expert Julie Dagnall.

“Fantastic seat to last until age four, and feels safe and secure and is I-Size compatible.  I like the innovation in the driving direction control which doesn’t allow for forward facing use before 16 months. It also feels cozy for a newborn,” MadeForMums Reviews Editor, Magda Ibrahim

Read our full review of the gb Vaya car seat here.

You can buy the the GB Vaya car seat from: Direct2Mum


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2. Britax Baby-Safe i-Size, £190 (base an additional £130 or £150) MadeForMums Awards Silver winner

  • Age suitability: Birth until 15 months
  • Rear-facing until: 15 months
  • Additional cost of ISOFIX base: i-Size Base, £130, Flex Base, £150, though there are deals when bought with car seat
  • Total cost from birth to 15 months: from £340
  • Travel system compatible: Yes – on Britax, UPPAbaby Vista and BabyStyle Oyster buggies, but not those of some of the big brands such as Bugaboo, iCandy or Silver Cross

This MadeForMums Silver Award winner is a firm favourite of the Royal family and the chosen infant car seat of Wills and Kate for both Prince George and Princess Charlotte.

It’s robust, super safe, well-made and affordable, it is also i-Size compatible, meaning it can be used rearward facing up to 15 months, has ISOFIX connectors (although it can be installed in a non i-Size way, by using the seat belt) and offers increased head and neck protection in the event of a side-impact accident. 

When used with the Britax Flex base, the seat base angle can be adjusted to a near-flat position and the Britax Baby SAFE i-Size also features deep padding to keep your newborn and growing baby comfy.

What our MadeForMums judges say about the Britax Baby SAFE i-Size car seat:

“My partner and I really liked the Britax Baby-Safe i-Size car seat – it offered more room to grow than our Stokke Izi Go and nudged ahead of our Maxi Cosi Pebble on account of its secure, 5- point harness, together with the fact it is suitable for babies up to 83cm. We would recommend it to parents looking for a car seat that conforms to the latest safety regulations, and who want a car seat that will accommodate their baby beyond their first year. It was easy to install, both with or without the ISOFIX base, and was comfortable for our 8-month-old son,” Tanya, mum of 2.

“This bang-up-to-date car seat feels really robust with rigorous research behind its design. You might pay £40 or £50 more than rival models but it’s worth it: you feel like you’re getting first-rate protection for your baby. as well as maximum support and comfort.  We were really impressed with the brand’s patented “lie-flat technology”. This automatically adjusts the straps and angle of the backrest too,” mum-of-two, Anna.

Read the full Britax Baby SAFE i-Size car seat review here

The Britax Baby-Safe i-Size car seat is available from Kiddicare and Pramworld


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3.   Joie i-Level, £250 (base included in price)

  • Age suitability: Birth until 15 months
  • Rear-facing until: 15 months
  • Additional cost of ISOFIX base: Included in price
  • Total cost from birth to 15 months: from £250
  • Travel system compatible: Yes – on Joie Mytrax, Joie Litetrax 4 and Joie Chrome

Suitable from birth the 15-months, this i-Size compatible car seat, features a memory foam head and side protection system and is travel system compatible with the popular Joie Chrome and MyTrax buggies.

The standout feature on this car seat is undoubtedly the fact that it lies flat, either in the car or on the buggy frame. 

When tested by our MadeForMums reviewers, she found the seat to be “very comfortable, easy to learn how to use with has great side impact protection!”

 You can buy the Joie i-Level from: Mothercare and Amazon


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4. Kiddy Evo-Luna i-Size car seat, £359 (including base)

  • Age suitability: Birth until 15 months
  • Rear-facing until: 15 months
  • Additional cost of ISOFIX base: Included in price
  • Cost from birth to 15 months: £359.95The Kiddy Evo-luna i-Size car seat has been picked as the best i-size car seat in the MadeForMums awards because it’s simply a groundbreaking car seat
  • Travel system compatible: Yes – compatible with a large number of buggies, including Bugaboo Bee, Bugaboo Cameleon, Bugaboo  Buffalo, Babyzen Yoyo, Babystyle Egg, Babystyle Oyster 2, Cosatto Woop, all iCandy pushchairs, Joie Chrome, Joolz Day 2, Joolz Geo, Mothercare Orb, UPPAbaby Cruz, UPPAbaby Vista and many other buggies (adaptors sold separately £34.95) 

lie-flat, Group 0+/1 infant seat, the Evo-Luna is the first i-Size car seat to let your baby lie flat in the car, which makes it particularly perfect for long car journeys.

It has won multiple awards for its safety features both here and in Germany, and is the first infant car seat to be awarded a ‘very good’ quality seal in the stringent ADAC and Stiftung Warentest consumer safety tests.

As well as conforming to the latest i-Size car seat laws, it has a 5-point safety harness and rocker function.

Read our full Kiddy Evo-Luna i-Size review

You can buy the Kiddy Evo-Lunafix from Precious Little One


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5. Cybex Aton Q i-Size, £200 (base an additional £110)

  • Age suitability: Birth until 13kg (around 15 months)
  • Rear-facing until: 15 months
  • Additional cost of ISOFIX base: £110
  • Cost from birth to 15 months: £365
  • Travel system compatible:-Yes – compatible with Cybex Priam, Cybex Onyx and Cybex Callisto, Mothercare Orb, Bugaboo Cameleon, iCandy and Baby Jogger buggies (adaptors sold separately £34.95) 

The updated version of an already popular celeb-loved car seat, the Cybex Aton Q, is now i-Size compatible, making suitable from birth to 15 months. 

It’s good to see it’s also retained features that made the Aton Q a best-seller, such as side impact protection, 8-position adjustable headrest and harness and extra-large canopy and it now has an ISOFIX base, for easier installation in to the car.  

You can buy the Cybex Aton Q from: Amazon and John Lewis


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6. Nuna Pipa Icon, £180

  • Age suitability: Birth until 15 months
  • Rear-facing until: 15 months
  • Additional cost of ISOFIX base: PipaFix base £130
  • Total cost from birth to 15 months:£310
  • Travel system compatible: Yes – with the Nuna IVVI and Pepp Luxx and will fit any buggy that can connect with Maxi-Cosi car seat adaptors

The Nuna Pipa Icon is a “chic, sturdy and safe” i-Size car seat, according to our MFM mum reviewer.

It comes complete with a 5-point harness that has three crotch buckle positions, three different handle positions, when carrying the seat, and a ‘dream drape’ that works like a meshed canopy for sleepy babies.

Read our full review of the Nuna Pipa Icon car seat.

You can buy the Pipa Icon from Precious Little One.


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7. Graco Snugride i-Size, £325 

  • Age suitability: Birth until 13kg (around 18 months)
  • Rear-facing until: 18 months
  • Additional cost of ISOFIX base: Included in price
  • Total cost from birth to 13kg (around 18 months):£325
  • Travel system compatible: Yes – with all Graco pushchairs

The Snugride is Graco’s first i-Size rear-facing car seat and will seat your baby rearwards facing from birth up to 13kg (around 18 months).

Many infant car seats only last to around 15 months, but the Snugride i-Size should last until your child is 18 months as it has an extendable and adjustable headrest, so may work well with toddlers who are tall for their age but still weigh under 13kg.

As it’s an infant car seat it still comes with a carry handle, 5-point safety harness and ISOFIX base.

You can buy the Graco Snugride from: Amazon and Asda


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8. Maxi-Cosi Pebble Plus, £199, then 2WayPearl, £255

  • Age suitability:Birth until 12 months, then using the same base, you can move to the 2WayPearl car seat till 4 years
  • Rear-facing until: Pebble Plus to 12 months, 2WayPearl to 4 years
  • Additional cost of ISOFIX base: Maxi-Cosi 2wayFix, £199
  • Total cost from birth to 4 years: £623 including 2 car seats and one base
  • Travel system compatible:Yes – with almost all pushchairs, but check with buggy manufacture before buying.The Pebble Plus is the updated version of the older, best-selling Pebble and a step on from the very popular Cabriofix car seat.

It can be used until your baby is 12 months in the rearward-facing position when teamed with a Maxi-Cosi 2wayFix base. The clever bit is that, using the same base, you can then buy the 2WayPearl to keep your child rearward-facing until around 4 years. 

The Pebble Plus offers all the safety features you’d expect, such as a 5-point harness, click-and-go installation and ISOFIX. And as it’s from Maxi-Cosi, the Pebble Plus car seat is travel system compatible with most of the biggest pushchair brands, including Bugaboo, Silver Cross and iCandy.

That’s why it’s one of the very few products that has scooped our coveted 5 out of 5 stars.

Read the full Pebble Plus and the2Way Pearl reviews

You can buy the Pebble Plus on Amazon or John Lewis


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9. Be Safe iZi Go Modular, £199.95, then iZi Modular iSize, £225

  • Age suitability: Birth until 12 months,then using the same base you can move to the iZi Modular iSize, £210, till 4 years
  • Rear-facing until: 4 years (105cm tall)
  • Additional cost of ISOFIX base: BeSafe iZi Modular ISOFIX Base, £199.99
  • Total cost from birth to 4: £624.94
  • Travel system compatible: Yes – with all Joolz and Stokke pushchairs and Silver Cross Surf, Silver Cross Wayfarer, Babystyle Oyster and Babystyle Oyster Max pushchairs

The Be Safe iZi Go Modular infant i-Size car seat works in a similar way to Maxi-Cosi’s i-size products: you buy two car seats to take you from birth to 4, and one base. However, the iZi Modular system will let your child face rearwards until they’re 4 (rather than 2 years for Maxi-Cosi). 

A nifty feature is that the base can be extended, giving your growing child more legroom, while rear-facing. 

The car seats feature a mixture of EPS (polystyrene) and EPP foam – the impact absorbing material that’s used in car bumpers – in the shell frame for added protection.   

The iZi Modular i-size base has a single fold-down leg support which will sound an alarm if it’s not correctly installed.

Read a preview of the Be Safe iZi infant car seat

You can buy the Be Safe iZi Go Modular car seat from John LewisPram World or Natural Baby Shower.


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10. Maxi-Cosi AxissFix Air, £550

  • Age suitability: Four months until 4 years
  • Rear-facing until: Approx 2 (87cm tall)
  • Additional cost of ISOFIX base: Included in price
  • Total cost from birth to 4 years: £550
  • Travel system compatible: No

The world’s first car seat with build in airbags, this is the updated version of the Maxi-Cosi best-seller the Axiss, which has an inflatable safety protection system built into the seat harness, and the airbags will inflate within 0.05 seconds in event of a crash. 

This new car seat also rotates a full 360 degrees, is rear-facing until little ones are 85cm tall or around 2 years old and i-Size compatible. 

You can buy the Maxi-Cosi AxissFix Air from: Pramcentre


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11. Jané Gravity car seat, £330 (base is included)

  • Age suitability:Birth until 4 years
  • Rear-facing until:4 years
  • Additional cost of ISOFIX base: included with seat 
  • Total cost from birth to 4 years:£330
  • Travel system compatible: No

A sleek rotating Group 0+/1 car seat with 360-degree swivel, it can be used from birth to 4 years and meets the latest i-Size regulations.

Rear-facing up to 4 years, the ISOFIX connectors are integrated and the seat comes with a newborn insert as standard. The Jané Gravity also has a no-nonsense adjustable 5-point harness and easy-to-adjust headrest, which is why it scooped the 2017 MFMA gold medal for rotating car seat.

You can buy the Jané Gravity from: Amazon, PreciousLittleOne and Kiddies Kingdom


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12. Cybex Sirona M i-Size, £350

  • Age suitability: Birth until 4 years
  • Rear-facing until: 4 years
  • Additional cost of ISOFIX base: Included in price
  • Total cost from birth to 4 years: £350
  • Travel system compatible: No

The updated version of the hugely-popular Sirona, the M i-Size features all the safety aspects that made the original Sirona a bestseller.

It’s a Group 0+/1 seat and is rear-facing to 105 cm (around 4 years) and forward-facing (if you choose) from 16 months or when your baby is 76cm tall. 

However, there are two big differences between the new and the original Sirona:

  • The new M i-Size has a click in and out base, whereas the old Sirona had a 360 degree rotating base
  • The new M i-Size has a 5-point harness, whereas the older version had an impact shield (called a safety cushion by Cybex) when used in the forward mode

Check out the full Cybex Sirona review here.

You can buy the Sirona M i-Size car seat from Mamas & Papas and Amazon


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13. Concord Reverso.Plus, £299, base is included

  • Age suitability: Birth until 4 years
  • Rear-facing until: 4 years
  • Additional cost of ISOFIX base: Included in price
  • Total cost from birth to 4 years: £299
  • Travel system compatible: No

The i-Size Concord Reverso.Plus is suitable from birth to 105 cm (around 4 years) and can be used rear-facing for the full 4 years.

Unusually it features a padded footplate, which automatically adjusts to your vehicle. It’s also lighter than many other i-Size 0+/1 car seats – but remember, these are bulky seats, so we’re not talking lightweight.

There’s a separate padded insert for newborn babies, which can be removed without rethreading the harness (hurrah!), plus there are light indicators when the seat is installed correctly. 

You can buy the Reverso.Plus car seat from Uber Kids


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14. Joie i-Anchor Advance, £200

  • Age suitability: Birth until 4 years
  • Rear-facing until: 4 years
  • Additional cost of ISOFIX base: i-base Advance £125
  • Total cost from birth to 15 months: £325
  • Travel system compatible: No

The Joie i-Anchor Advance is an updated version of the first i-Size car seat certified for i-Size by the UK Government. It’s a multi-stage Group 0+/1, taking your child up to 4 years old and will allow babies to sit rear-facing until that point. 

It has multi-height headrest and a harness adjust that both can be done with one hand – always useful. 

Loved by our MFM mum reviewer for its comfort, sturdiness and safety, the seat’s also great value for money.

Read our full Joie i-Anchor Advance review

You can buy the Joie i-Anchor from Boots


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15. Recaro Zero 1. Elite, £399 – MadeForMums Awards Silver winner – Rear Facing For Longer

  • Age suitability: Birth – 18kg (birth – 4 years)
  • Rear-facing until:  18kg (around 4 years)

A unique car seat on the market, the Recaro Zero 1. Elite car seat is a Group 0+/1 seat that’s suitable from birth to around 4 years.

It’s unique as it has an infant carrier, nestled inside a bigger Group 1 car seat, that means the infant car seat can be removed and used on Recaro buggy as a travel system.  And when your toddler gets older you can use the Zero 1 Elite as a rear-facing seat to 4 years. 

What our MadeForMums judges say about the Recaro Zero 1. Elite 5 car seat:

“A good seat, the extended rear-facing position is good and looks roomy for the child’s size,” Julie Dagnall, Child Seat Safety expert.

“The 360 degree turn, the deep-padded seats, sticky grip pads on the underside of the harness straps, the light weight of the infant carrier. The newborn cushion and seat reducer are perfect for getting a comfortable ride for your little one. It’s particularly good for parents who want invest in just one good car seat for the first 4 years,” Melanie, mum-of-3. 

You can buy the Recaro Zero 1. Elite car seat from: Direct2Mum and Hello Baby


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The car safety guidelines you should know

The 2 hour rule – it’s safest not to keep your baby in a car seat for longer than 2 hours, with the exception being a lie-flat car seat. The key thing is that car seats are made to be used in a car – rather than as a carrycot for your baby to sleep in at home. If you’re using the car seat as part of a travel system, you need to follow the 2 hour rule. 

How the car seat fits in your car – not all car seats fit in all cars, and incorrectly fitted seats can be dangerous – so make sure you get it professionally fitted. Some manufacturers also offer a quick online checking service, such as Britax’s Fit-Finder or Maxi-Cosi’s car fitting list to see if a car seat is compatible with your car. Have your car’s make, model and year of production close to hand for fast checking.

Safety – when choosing a car seat, safety should be at the top of the list. While price is important, it’s not actually an indicator of how safe a car seat is, but don’t settle for second best – or secondhand.

ISOFIX – Not all cars have ISOFIX – so check your car is compatible before buying an ISOFIX seat. Although some ISOFIX car seats can also be fitted into a non-ISOFIX car with a seat belt – however, if using a seat belt, the car seat no longer confirms to all the i-Size regulations. 

Want more car seats?  We’ve got you covered…

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MadeForMums product reviews are independent, honest and provide advice you can have confidence in. Sometimes, we earn revenue through affiliate (click-to-buy) links. However, we never allow this to influence our coverage. Our reviews and articles are written by parents who are professional journalists, and we also include feedback from our parent community and industry experts.

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