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Britax Römer KIDFIX i-SIZE - Storm Grey

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Suitable from around 3.5 to 12 years, the Britax Römer KIDFIX i-SIZE is equipped with all patented child safety features and approved to the latest safety standards. It features a lighter and slimmer design with additional air vents in the shell.

Safest place for growing dreams


The KIDFIX i-SIZE is a new generation child car seat from Britax Römer suitable from 100 - 150 cm of child's tall (approx. 3.5 - 12 years old). This innovative product has been developed in partnership with leading car manufacturers, to provide the ultimate car travel safety and comfort to your child. The KIDFIX i-SIZE is featured with a new sporty design and isapproved with new i-Size standard, which make it the safest KIDFIX model (confirmed during Britax Römer internal tests, 2021).

Expert protection

KIDFIX i-SIZE  Expert protection

The KIDFIX i-SIZE has been equipped with all latest Britax Römer safety technologies developed with one thing in mind - maximum protection. The Advanced Side Impact Protection (SICT) reduces the side impact forces by up to 40%. The SecureGuard helps reduce abdominal forces in the event of a frontal collision by up to 35 %. Finally XP-PAD prevents the impact of your child's chin on their chest and absorbs up to 30% energy in frontal impact. All of these are now combined with the redesigned seating area that help reduce the neck loads by up to 50 kg and offer all-round protection with optimum crash performance.

Comfort and practicality at its core

Comfort and practicality at its core

Except KIDFIX i-SIZE offers excellent level of comfort for your growing child. The KIDFIX i-SIZE seat comes with air ventilated shell and generously padded soft fabric covers to provide a comfy spot for long travels. Its easy adjustable ergonomic headrest with markings help the allow you to set the right headrest height for your child. The KIDFIX i-SIZE features slim space-saving design, that lets you install three of these in a row in a wide range of vehicles.

German quality

German quality

As the 90% of Britax Römer, the KIDFIX i-SIZE is manufactured in Germany or Great Britain with high attention to every detail and with care of environment too. For example the KIDFIX i-SIZE weighs around 0.6 kg lighter than its previous version, as it been produced with less plastic which contributing to minimize the impact on the environment. The Britax Römer also reduced the printed leaflets enclosed with the product, to give you more choice online.

All features:

  • Premium quality car seat suitable from 3.5 to 12 years
  • Redesigned seating area for optimum crash performance
  • Slim design allows to place three seats in a row
  • Advanced Side Impact Protection – SICT reduces the side impact forces
  • SecureGuard reduces abdominal forces
  • XP-PAD reduces frontal forces and prevents the impact of your child's chin on their chest/li>
  • Unique protection for the back, neck and chest
  • Easy adjustable, ergonomic headrest
  • Air ventilation in shell wings
  • Belted or belted and ISOFIX installation
  • Installation indicators confirm the seat is installed correctly
  • Stylish, soft padded and washable cover


  • Dimensions: H63-83 cm x W 48cm x D43 cm
  • Weight: 7.4 kg

Britax Romer offers a two year guarantee against manufacturing or material defects on all  their products.

Please retain your receipt as proof of purchase and complete your warranty card if available.

Mainland UK Delivery Options

Orders £50.00 and over - (DPD) 1-2 Working Days - FREE

Orders below £50.00 - (DPD) 1-2 Working Days - £6.95

Orders below £50.00 - (EVRI) 2-3 Working Days - £3.95

The following postcodes are sent on a standard 2-3 day delivery:
PA20-PA99 TR21-25
ZE(ALL) KA27-28
HS1-9 G83
AB30 AB39-AB40

Unfortunately, we are unable to deliver to BFPO numbers.

UK Highlands, Islands and Northern Ireland Delivery Options

All UK Highlands, Islands and Northern Ireland Orders are charged at a flat rate of £8.95 (sent with DPD)

Channel Isles – all orders sent at a flat rate of £19.95

The following postcodes are UK Islands and Ireland:
BT(All) EI(All) IM(All)

DPD Predict Service

Never miss a parcel delivery – for orders sent via DPD you will be notified by text and email on the day of despatch and again on the day of delivery offering a one hour time-slot. If you’re unavailable during this time you have the option of re-arranging your delivery date, or for your delivery to be left with a neighbour.

Download the DPD Predict app and nominate a specific neighbour, your chosen safe place or collect the parcel from your local DPD pickup shop. Please note that a signature is required for all DPD deliveries.

Direct Deliveries from Supplier

Where a product states direct delivery, this will be fulfilled by the supplier directly from their warehouse. Each supplier has a different delivery service. Please contact our sales team on [email protected] for any queries regarding direct deliveries.

Please note that we can only deliver furniture to mainland UK, excluding the Highlands of Scotland, Islands and Ireland. We are unable to accept orders for International delivery.

International Deliveries

From the 1st January 2021, Winstanleys Pramworld will no longer ship items internationally, However - a number of our customers use parcel forwarding service such as forward 2 me.

Parcel Forwarding Service

forward2me Worldwide Parcel Forwarding Service

For delivery outside the UK, a number of our customers have used forward2me, the top-rated Parcel Forwarding Service. forward2me offers a choice of premium courier services including DHL, UPS, DPD, TNT & Whistl to forward parcels to over 200 countries at very competitive prices.

Other services include a Combine and Repack Service where you can make lots of purchases and ship as one to save on international shipping costs. For more information including independent customer reviews please visit the forward2me website or watch the how it works video.