Discover i-Size Space

Discover i-Size Space
Sale price £99.00 Regular price £150.00 Save £51
 
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Summer Sale
Discover i-Size Space
Sale price £99.00 Regular price £150.00 Save £51
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Go the distance with Discover i-Size – our premium high-back booster seat with integrated ISOFIX connectors.

  • Suitable from 4 to 12 years old
  • 4 recline positions for naps on the go
  • 10 headrest positions to grow with your child
  • Adjustable thigh support for growing legs
  • Side Impact Protection System for head, neck and hips
  • Car Seat Crash Replacement & Recycling Services
  • Suitable from 4 to 12 years
  • 4 recline positions and 10 headrest positions
  • Adjustable thigh support

Next day delivery available

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Discover i-Size is our high-back booster seat suitable from 4 to 12 years old. Fitting securely into your vehicle using the integrated ISOFIX connectors and seatbelt guides, our high-back booster is super easy to install, with its slimline design allowing up to three car seats in the back of your vehicle.

Product Description

Go the distance with Discover i-Size – our premium high-back booster seat with integrated ISOFIX connectors. Suitable from 4 to 12 years old, our group 2/3 car seat is approved to the latest R129/03 safety standard, offering unrivalled protection on every journey. 

Discover i-Size has the most comfortable ride thanks to its ergonomic reclining seat with bamboo soft-touch inserts, an easy-adjust headrest, slimline base, fixed belt guides and built-in thigh support. As your little one grows, Discover i-Size’s Side Impact Protection System and extended seat shell will keep them safe and secure from head to hip.  

Every Silver Cross car seat is covered by our Car Seat Crash Replacement Scheme, meaning that if you are unfortunately in an accident we will help you to secure a new one.

Specification

Discover i-Size Dimensions: W44cm x H66-81cm x D31cm

Discover i-Size Weight: 7.1kg

Product Manuals

Discover i-Size Instruction Manual

Vehicle Fitting List

Shipping & returns

Standard Delivery
Our standard delivery service will ensure that your goods arrive at your delivery address by courier within 1 to 7 working days of placing the order. For clarity, working days are Monday to Friday and do not include weekends or bank holidays.

Express Delivery
Want it tomorrow? Express delivery guarantees next working day delivery for £10 (orders must be placed before 1pm to qualify).

Saturday Delivery
You can choose to receive your order before 12pm on the next Saturday if you prefer, but this only available if you order before 1pm on a Friday. A total extra charge of £20 is applied to this service if you request it - but this charge is not per product, so even if you order 2 or more items the charge will still only be £20. This service is NOT available to postcodes that fall within our Highlands & Remote Islands list. Read more.

We do not deliver to Northern Ireland or Isle of Wight, please find your nearest retailer here.

Our guarantee

When you purchase a Silver Cross pram, pushchair, car seat, or nursery furniture, you’ll be covered by a three-year warranty against any manufacturing faults, giving you added peace of mind.

Features

Side Protection System

Keeps your little one safe and protected on every journey, giving extra security from the head to the hips with the extended seat shell protecting the full torso.

Removable inserts

Discover i-Size’s seat features removable inserts made from bamboo soft-touch fabric to provide more space as your child grows.

Integrated belt guides

Pulling the adult seatbelt across the high-back booster is easy thanks to the seat’s fixed belt guides.

Thigh support

The extendable thigh support provides extra comfort on every journey.

Adjustable recline

With 4 recline positions, the ergonomic padded seat is ideal for extra comfort on those longer journeys.

10 headrest positions

Discover i-Size will grow as your little one does thanks to the 10 headrest positions which can be adjusted effortlessly with one hand.

ISOFIX system

Secure installation with the optional ISOFIX system.

Easy clean fabrics

Discover i-Size features easy clean fabrics crafted from recycled plastic bottles and bamboo soft-touch for style, comfort and longevity.

Unrivalled safety

We pride ourselves in rigorously testing our car seats above and beyond regulation. Discover i-Size is approved to the latest R129/03 safety standard for unrivalled safety.

Easy install

Discover i-Size’s slimline base and optional ISOFIX connectors allow you to fit up to three car seats in the back of your car.

Product Comparison

Discover i-Size Space
Summer Sale
Available colours
  • Suitable from 4 to 12 years
  • 4 recline positions and 10 headrest positions
  • Adjustable thigh support
Sale price £99
Regular price £150
Save £51
  • High-back booster seat.
  • 4-12 years. 
  • Height: 100-150cm. 
  • Rotation: Discover i-Size does not rotate. 
  • Recline Positions: 4 positions. 
  • Direction of Travel: Forward facing only. 
  • Installation Method: Discover i-Size can be installed with the integrated ISOFIX and adult seatbelt, or adult seatbelt only
Motion 3 All Size 360 Rotating Car Seat Iconic Black
3 piece bundle
Available colours
  • Suitable from birth to 12 years
  • 360° rotating all-stage car seat
  • Extended rear-facing up to 18kg
Sale price £275
  • All-stage car seat 
  • Birth to approx. 12 years 
  • Height: 40-145 cm  
  • Harness Weight: 18kg  
  • Rotation: Motion 3 fully rotates 360° with integrated ISOFIX base. 
  • Recline Positions: 3 positions. 
  • Direction of Travel: Extended rear facing and forward facing. 
  • Installation Method: Installed with the use of its integrated ISOFIX base and support leg. 
Perform Extended Rear-Facing Car Seat Iconic Black
Available colours
  • Suitable from birth to 125cm
  • Extended rear-facing up to approx. 7 years
  • Swedish Plus Tested
Sale price £395
  • Multi-stage car seat. 
  • Birth to Approx. 7 years. 
  • Height: 40-125cm 
  • Harness Weight: 21.5kg 
  • Rotation: Perform does not rotate. 
  • Recline Positions: 5 positions and 9 headrest positions.  
  • Direction of Travel: Rear facing only.  
  • Installation Method: Perform is installed with its integrated ISOFIX base, support leg and re-bound bar. The useful green indicators help ensure your Perform is installed correctly and safely.  
Balance i-Size Space
Summer Sale
Available colours
  • Suitable from 15 months to approx. 12 years
  • Extended harness to 21kg
  • 4 recline and 9 headrest positions
Sale price £170
Regular price £250
Save £80
  • Multi-stage car seat. 
  • 15 months to Approx. 12 years. 
  • Height: 76-150cm. 
  • Harness Weight: 21kg. 
  • Rotation: Balance i-Size does not rotate. 
  • Recline Positions: 4 positions. 
  • Direction of Travel: Forward facing only.  
  • Installation Method: When using the 5 point harness between 76 – 105cm, Balance i-Size is installed with integrated ISOFIX and top tether strap. When securing your child with the adult seatbelt between 100 – 150cm, the seat is installed with ISOFIX only.
Approach Plus 360 Car Seat Iconic Black
Available colours
  • Suitable from birth to 19.5kg/40-105cm
  • 2026 ADAC award winner
  • Effortless 360° spin with Base Plus 360
Sale price £295
  • ADAC awarded multi-stage car seat. 
  • Birth to Approx. 4 years. 
  • Height: 40-105cm. 
  • Harness Weight: 19.5kg. 
  • Rotation: Base Plus 360 allows full rotation with Approach Plus 360. 
  • Recline Positions: 4 seat recline positions & 3 rear facing inner seat recline positions.  
  • Direction of Travel: Extended rear facing & forward facing. 
  • Installation Method: Installed with Base Plus 360 – ISOFIX and Support Leg.  Base sold separately.
Glide Plus 360 Infant Car Seat Iconic Black
2 piece bundle
Available colours
  • Suitable from birth to 13kg
  • 2026 ADAC award winner
  • Compatible with a range of prams and strollers
Sale price £225
  • ADAC awarded lie-flat infant carrier. 
  • Birth to Approx. 18 months. 
  • Height: 40-87cm.  
  • Harness Weight: 13kg. 
  • Rotation: Glide Plus 360 can rotate to a side loading position when used with Base Plus 360.
  • Recline Positions: 3 positions. 
  • Direction of Travel: Rear facing only. 
  • Installation Method: Glide Plus 360 is installed with the adult 3-point seatbelt. When using Base Plus 360, the base is installed with ISOFIX and support leg. Glide easily connects to the base for quick and easy installation and rotation.

Car compatibility checker

Ensure your chosen Silver Cross car seat is compatible with all the vehicles it will be used in.

Make:

Model:

Variant:

*Although our results are accurate for the vehicles we tested, vehicle variations can occur and for that reason we always suggest having the car seat checked in your car before making a final purchase.

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Compatible car seats (8)

Sorry there are currently no products available for this vehicle

  • Motion 3 All Size 360 Rotating Car Seat Iconic Black
    3 piece bundle
    Available colours
    • Suitable from birth to 12 years
    • 360° rotating all-stage car seat
    • Extended rear-facing up to 18kg
    Sale price £275
    Shop now
  • Perform Extended Rear-Facing Car Seat Iconic Black
    Available colours
    • Suitable from birth to 125cm
    • Extended rear-facing up to approx. 7 years
    • Swedish Plus Tested
    Sale price £395
    Shop now
  • Motion 3 All Size 360 Rotating Car Seat Natural Taupe
    3 piece bundle
    Available colours
    • Suitable from birth to 12 years
    • 360° rotating all-stage car seat
    • Extended rear-facing up to 18kg
    Sale price £275
    Shop now
  • Glide Plus 360 Infant Car Seat Iconic Black
    2 piece bundle
    Available colours
    • Suitable from birth to 13kg
    • 2026 ADAC award winner
    • Compatible with a range of prams and strollers
    Sale price £225
    Shop now
  • Approach Plus 360 Car Seat Iconic Black
    Available colours
    • Suitable from birth to 19.5kg/40-105cm
    • 2026 ADAC award winner
    • Effortless 360° spin with Base Plus 360
    Sale price £295
    Shop now
  • Balance i-Size Space
    Summer Sale
    Available colours
    • Suitable from 15 months to approx. 12 years
    • Extended harness to 21kg
    • 4 recline and 9 headrest positions
    Sale price £170
    Regular price £250
    Save £80
    Shop now
  • Discover i-Size Space
    Summer Sale
    Available colours
    • Suitable from 4 to 12 years
    • 4 recline positions and 10 headrest positions
    • Adjustable thigh support
    Sale price £99
    Regular price £150
    Save £51
    Shop now
  • Essential Discover
    Available colours
    • Suitable from 4 to 12 years
    • 4 recline positions and 10 headrest positions
    • Adjustable thigh support
    Sale price £89.99
    Shop now

£

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All you need to know

Frequently
asked questions

Got a question? Contact us

What age is Discover i-Size suitable for?

Discover i-Size is our premium high-back booster, suitable from age 4 to 12 years/height 100-150cm.

Which safety standards does Discover i-Size meet?

At Silver Cross, we pride ourselves in rigorously testing our car safety products above and beyond standard to give parents the ultimate peace of mind on every journey they make. Discover i-Size is approved to the latest R129/03 safety standard – find out more on how we test our car seats on The Edit.

How should I install Discover i-Size into my vehicle?

Discover i-Size features built-in ISOFIX connectors which are optional when fitting the car seat. If used, the indicators will turn green once the seat is secured. If you choose not to use the connectors, the seat can be fitted into your car using the adult seatbelt.

How much does the seat weigh?

The seat is sturdy yet lightweight at just 7.1kg, making it easy to transfer between vehicles. Thanks to Discover i-Size’s slimline base, you can fit up to three car seats in the back of your car.

What’s the difference between Discover i-Size and Essential Discover i-Size?

Both car seats are exactly the same in terms of functionality and safety standards. Discover i-Size is crafted from premium eco fabrics made from recycled plastic bottles, with luxury finishes such as the heat-regulating bamboo insert for increased style and comfort, whereas Essential Discover i-Size is more minimalistic in its design.

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