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Slim Car Seats

Discover slim car seats designed to maximise space for families needing a narrower fit, perfect for fitting 3 in a row or smaller cars. Top brands such as Joie, Graco, and Cuggl offer options including high-back boosters, ISOFIX compatibility, reclining positions, and extra comfort features for all ages.

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ISOFIX
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I size certified
251 products
Joie Elevate R129 Toddler to Booster Car Seat - Shale
Rating 4.8 out of 5, from 649 reviews
£65.00
Cuggl R129 Standard Booster Car Seat - Black
Rating 4.9 out of 5, from 112 reviews
£15.00
INFO exclusive
Harmony Genesys R129 High Back Booster Car Seat
Rating 4.7 out of 5, from 25 reviews
Save £20.00
£30.00
INFO exclusive
Joie Tilt Group 0+/1 R44/04 Deep Recline Car Seat - Pavement
Rating 4.7 out of 5, from 636 reviews
Save 20%
£60.00
Joie i-Pivot 360 i-Size Spinning R129 Car Seat - Shale
Rating 4.9 out of 5, from 31 reviews
Lowest Price Ever
£124.00
Free Delivery
INFO exclusive
Harmony Insight Isofix R129 Booster Car Seat
Rating 3.8 out of 5, from 11 reviews
Less Than Half Price
£35.00
CLEARANCE BADGE
Cuggl i-Size R129 Infant Carrier and Isofix Base
Rating 3.6 out of 5, from 27 reviews
Save 1/3
£35.00
Joie i-Chapp FX R129 i-Size ISOFIX Car Booster Seat - Black
Rating 4.6 out of 5, from 13 reviews
Save 20%
£32.00
Joie Stages Group 0+/1/2 R44/04 Car Seat - Coal
Rating 4.7 out of 5, from 126 reviews
Save 20%
£80.00
INFO exclusive
Cuggl Isofix R129 Car Booster Seat - Black
Rating 4.9 out of 5, from 190 reviews
£30.00
Graco Junior Maxi i-Size R129 Booster Car Seat - Midnight
Rating 4.8 out of 5, from 254 reviews
£40.00
Joie i-Juva R129 i-Size Birth To 12 months Car Seat - Shale
Rating 4.5 out of 5, from 200 reviews
£60.00
Joie Bold R Group 1/2/3 R44/04 ISOFIX Car Seat - Ember
Rating 4.7 out of 5, from 84 reviews
£120.00
Free Delivery
Joie Elevate R129 Toddler to Booster Car Seat - Thunder
Rating 4.8 out of 5, from 649 reviews
£65.00
Graco Junior Maxi R44 Booster Car Seat - Black 
Rating 4.7 out of 5, from 1732 reviews
£40.00
INFO exclusive
Cuggl R129 Rotating Group 0+1-2-3 i-Size ISOFIX Car Seat
Rating 4.8 out of 5, from 158 reviews
£130.00
Free Delivery
INFO exclusive
Cuggl R129 Isofix 123 Car Seat
Rating 4.6 out of 5, from 97 reviews
£80.00
INFO exclusive
Joie i-Size R129 Itrillo FX ISOFIX Car Seat - Mercury Mesh
Rating 4.4 out of 5, from 8 reviews
£80.00
Joie i-Trillo i-Size R129 Belted Booster Car Seat - Shale
Rating 4.8 out of 5, from 236 reviews
£60.00
Graco Booster Basic R129 Car Booster Seat - Black
Rating 4.8 out of 5, from 105 reviews
£18.00
My Babiie MBCS50 Toddler to Booster R129 Car Seat - Black
Rating 4.8 out of 5, from 32 reviews
£50.00
Free Delivery
Joie Every Stage R129 Birth To 12 Car Seat - Shale
Rating 4.8 out of 5, from 42 reviews
£180.00
Free Delivery
BebeConfort Manga Isofix R129 Car Booster Seat - Black
Rating 4.6 out of 5, from 12 reviews
£40.00
My Babiie MBCS80 Foldable Toddler ISOFIX Car Seat - Black
Rating 4.9 out of 5, from 23 reviews
£70.00
Free Delivery
Graco SlimFit R129 Convertible Car Seat - Iron
Rating 5.0 out of 5, from 4 reviews
£120.00
Free Delivery
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Cuggl R129 I-Size ISOFIX Lie Flat Infant Carrier Car Seat
£60.00
My Babiie MBCS400 Spin R129 Car Seat with Support Leg -Black
Rating 4.9 out of 5, from 38 reviews
£119.00
Free Delivery
INFO exclusive
Harmony Genesys Harnessed R129 Booster Car Seat
Rating 4.5 out of 5, from 35 reviews
£80.00
Cuggl ISOFIX R129 High Back Booster Car Seat
Rating 4.1 out of 5, from 13 reviews
£65.00
My Babiie MBCS200 Spin R129 Car Seat with Top Tether - Black
Rating 4.9 out of 5, from 44 reviews
£100.00
Free Delivery
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My Babiie MBCS300 Group 0+ 1-2-3 ECE R129 i-Size 360 ISOFIX Car Seat - Black
Rating 4.8 out of 5, from 26 reviews
£110.00
Free Delivery
INFO exclusive
Joie Steadi R129 With Canopy Car Seat - Raven
Rating 3.3 out of 5, from 3 reviews
£100.00
Free Delivery
INFO exclusive
Joie Elevate R129 Toddler to Booster Car Seat - Taupe
Rating 4.8 out of 5, from 649 reviews
£65.00
Maxi-Cosi RodiFix M R129 ISOFIX Car Seat - Black
Rating 4.9 out of 5, from 45 reviews
£100.00
Free Delivery
Joie Every Stage R129 Birth To 12 Car Seat - Cobblestone
Rating 4.8 out of 5, from 42 reviews
£180.00
Free Delivery
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My Babiie MBCS200 Group 0+ 1-2-3 ECE R129 i-Size 360 ISOFIX Car Seat - Pink
Rating 4.9 out of 5, from 35 reviews
£100.00
Free Delivery
Maxi Cosi CabrioFix R129 i-Size Car Seat
Rating 4.8 out of 5, from 38 reviews
£130.00
Free Delivery
My Babiie MBCS100 i-Size 2-in-1 Car Seat - Black
Rating 4.8 out of 5, from 33 reviews
£70.00
Free Delivery
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My Babiie MBCS50 Group 1-2-3 ECE R129 i-Size Car Seat - Pink
Rating 4.8 out of 5, from 32 reviews
£50.00
Free Delivery
Silver Cross Motion 3 All Stage ISOFIX R129 Car Seat - Black
Rating 4.8 out of 5, from 28 reviews
Save £50.00
£225.00
Free Delivery
Silver Cross Essentials Discover Group 2-3 ISOFIX Car Seat
Rating 4.8 out of 5, from 25 reviews
£80.00
Maxi-Cosi RodiFix S R129 ISOFIX Car Seat - Black
Rating 4.7 out of 5, from 22 reviews
£150.00
Free Delivery
Joie i-Spin 360 i-Size Spinning R129 Car Seat - Shale
Rating 4.8 out of 5, from 18 reviews
£200.00
Free Delivery
Maxi Cosi Emerald S 360 R129 Car Seat Black
Rating 4.4 out of 5, from 32 reviews
£240.00
Free Delivery
Joie i-Bold R129 Toddler To Booster Car Seat - Shale
Rating 4.9 out of 5, from 10 reviews
£160.00
Free Delivery
CLEARANCE BADGE
Cybex Sirona GI R129 Car Seat - Black
Rating 4.0 out of 5, from 1 reviews
Lowest Price
£170.00
Free Delivery
VALUE 2 for 15new badge
Koo-Di Oopsie Do Do Car Seat Protector
£10.00
Cosatto Get Set Grow Car Seat - D is for Dino
Save Over £59.00
£120.00
Free Delivery
Maxi-Cosi Pearl R129 i-Size 360 ISOFIX Car Seat - Black
Save £75.00
£175.00
Free Delivery
Britax Kidfix Isize R129 Booster Car Seat - Black
Rating 4.7 out of 5, from 74 reviews
Save 10%
£179.00
Free Delivery
My Babiie MBCS23 High-Back Booster ISOFIX Car Seat - Black
Rating 4.7 out of 5, from 40 reviews
£60.00
Free Delivery
Britax Romer Discovery Plus Isofix Booster Car Seat - Black
Rating 5.0 out of 5, from 21 reviews
Save 25%
£105.00
Free Delivery
Maxi-Cosi Emerald 360 ISOFIX R129 Car Seat - Graphite
Rating 4.5 out of 5, from 57 reviews
£300.00
Free Delivery
CLEARANCE BADGE
Silver Cross Motion 2 R129 Car Seat - Black
Rating 4.8 out of 5, from 26 reviews
Lowest Price Ever
£220.00
Free Delivery
INFO exclusive
Harmony Phoenix R129 i-Size ISOFIX Car Seat
Rating 4.6 out of 5, from 35 reviews
£120.00
Free Delivery
Maxi-Cosi Titan I-size R129 Car Seat Tonal Black
Rating 4.7 out of 5, from 27 reviews
£200.00
Free Delivery
Maxi Cosi Titan S R129 I-size ISOFIX Car Seat
Rating 4.7 out of 5, from 24 reviews
£200.00
Free Delivery
Cuggl i-Size R129 High Back Booster Car Seat- Black
Rating 4.7 out of 5, from 19 reviews
Save 25%
£30.00
My Babiie MBCS05 Rotating Infant Carrier & Toddler Car Seat
Rating 5.0 out of 5, from 11 reviews
Save £30.00
£219.00
Free Delivery
My Babiie MBCS02 i-Size R129 Car Seat And Base - Black
Rating 5.0 out of 5, from 10 reviews
Save £20.00
£130.00
Free Delivery

Related categories

Group 1‑2‑3 Car SeatsGroup 2-3 Car SeatsCar Booster SeatsJoie Car SeatsCuggl Car SeatsForward and Rear Facing Car SeatsISOFIX Car SeatsNot ISOFIX Compatible Car SeatsHigh Back Booster Car SeatsBaby Sit Me Up Seats