Free & fast delivery
Any shape or size
Made in the UK
Custom Size Mattress – Island Shape
From: £274.99
Displaying all reviews.
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Pre-production plan emailed after ordering
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Cut to any size
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Free Mainland UK delivery
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5 year warranty
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Zip off cover included
Selected Shape:
Island
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Original
Our Memory Foam mattress helps distribute weight evenly and reduce pressure pointsFirmness options:MediumFirm Orthopaedic+ £40Add-ons:Zip link hinge+ £40Fabric link hinge+ £40Features:✓5 year warranty✓FlexiDRY® zip off cover✓Dual layer construction✓Pressure relieving top layer✓Supportive base layer✗Rebounds & recovers faster✗ComfiCel® comfort layer✗AeroFresh® performance layer✗Retains less excess body heat✗Enhanced pressure relief -
Better
Our RevitaLift® mattress is extremely responsive and bounces back much faster than standard memory foam, allowing you to move more freelyFirmness options:Medium / FirmFirm Orthopaedic+ £40Add-ons:Zip link hinge+ £40Fabric link hinge+ £40Features:✓5 year warranty✓FlexiDRY® zip off cover✓Dual layer construction✓Pressure relieving top layer✓Supportive base layer✓Rebounds & recovers faster✓ComfiCel® comfort layer✗AeroFresh® performance layer✗Retains less excess body heat✗Enhanced pressure relief -
Best
Our AeroFresh® mattress bounces back faster than regular memory foam, retains less excess heat and maintains a more neutral temperatureFirmness options:Medium / FirmFirm Orthopaedic+ £40Add-ons:Zip link hinge+ £40Fabric link hinge+ £40Features:✓5 year warranty✓FlexiDRY® zip off cover✓Triple layer construction✓Pressure relieving top layer✓Supportive base layer✓Rebounds & recovers faster✓ComfiCel® comfort layer✓AeroFresh® performance layer✓Retains less excess body heat✓Enhanced pressure relief
Displaying all reviews from the "Premium Memory Foam" product range.
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Displaying all reviews from the "RevitaLift® Foam" product range.
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Displaying all reviews from the "AeroFresh® Cool Memory Foam" product range.
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A good nights sleep shouldn’t cost an arm and a leg, so we’ve stayed up really late creating a mattress that’s big on quality, yet small on price. We’ve not cut any corners, so you’ll love snuggling down on your mattress every single night. Oh, and we nearly forgot to mention it’s backed by a 5 year warranty – well isn’t that impressive!
Pressure relieving
Old fashion springs push against your body with equal force meaning pressure points are inevitable. Our memory foam is different, distributing body weight more evenly and reducing pressure … ah, now thats better.
Cloud like support
This mattress provides a medium level of support perfect for a wide range of different sleepers. If you’re heavier than 15 stone (or just prefer a firmer mattress) be sure to upgrade to the firmer feel so you stay properly supported.
Less rolling together
Sleep through your partners disturbances and let them roll around guilt free on a mattress that isolates movement.
Two comfortable layers
They say two’s better than one, which is why your new mattress has been made with 2 layers – a cushiony layer on top and a firmer more supportive layer at the bottom.
Durability built in
Our mattresses are designed to give you 5 years of amazing everyday sleep – we’ve even backed it up with a 5 year warranty for peace of mind.
Zip off cover
Mistakes happen and should you spill your favourite cup of tea all over your new mattress, just unzip the cover and clean it with ease – simple!
Turning over shouldn’t feel like a challenge and RevitaLift® provides total freedom to move. For restless sleepers, there’s no waiting, no resistance - just seamless support that moves with you. Twist, turn, and roll without a second thought.
RevitaLift® relieves pressure exactly where you need it, while staying buoyant, responsive, and ready for your next move. No lagging behind, no sinking - just effortless, pressure free sleep.
Spring lovers, listen up
We get it - you’ve always loved the bounce of a spring mattress. But remember when you swore you'd never trade your trusty flip phone for a smartphone? Or that streaming could never replace your DVD collection? Just like those moments, this is the next step forward
RevitaLift® offers the familiar responsiveness of springs, just without any of the drawbacks. Unlike springs, which create pressure points, RevitaLift® adapts to your every move, providing the perfect balance of comfort and support - so you feel the bounce, not the pressure.
With its ability to minimise motion transfer, you and your partner can sleep soundly through the night, no matter how much either of you turn. From fidgety kids to restless adults, RevitaLift® redefines what it means to sleep effortlessly, so you wake up feeling refreshed and ready to take on the world. This is more than just foam, it’s a level of freedom that keeps up with you, no matter how you sleep.
In industry-standard testing (BS EN ISO 8307), Revitalift® performed incredibly, delivering 400% more bounce-back than traditional memory foam. This gives a light, buoyant feel that makes movement effortless. By reducing resistance, it helps you change positions easily, minimising disturbances promoting a deeper, more refreshing night’s sleep.
Unlike memory foam, which gently contours to your shape, Revitalift® is 5x more resilient. Instead of a slow, sinking feeling, it instantly adapts and bounces back, maintaining its shape effortlessly. This helps to keep you well supported while remaining responsive to movement, without the delayed reaction of traditional foams.
Breathe easy, sleep cooler
With its naturally open-celled structure and higher porosity than memory foam, air flows more freely, maintaining the perfect balance of temperature and moisture control. The result? A mattress that stays cooler, fresher, and more comfortable - no effort required.
This helps the body better regulate core temperature, promoting a higher-quality, deeper night’s sleep.
The FlexiDRY® fabric provides our best ever temperature control and moisture wicking. FlexiDRY® actively responds to changes in temperature. As body heat rises, molecules inside the fabric begin changing shape, which increase how moisture is wicked away and evaporated.
This means, any unwanted moisture will dissipate away much faster, resulting in a cooler, drier you!
The flexible 4-way stretch design works harmoniously with the rest of the mattress, adapting to your every curve and contour, eliminating resistance.
Faster to respond
Memory foam can be slow to mould to your body. Our ComfiCel foams won’t leave you waiting and begin adapting to your unique shape immediately.
Better freedom to roll
Regular memory foam reacts to changes in temperature which can make it slow to bounce back. ComfiCel foams react to body pressure instead allowing them to start recovering instantly.
Pressure relieving
Old fashion springs push against your body with equal force meaning pressure points are inevitable. Our memory foam is different, distributing body weight more evenly and reducing pressure … ah, now thats better.
Cloud like support
This mattress provides a medium level of support perfect for a wide range of different sleepers. If you’re heavier than 15 stone (or just prefer a firmer mattress) be sure to upgrade to the firmer feel so you stay properly supported.
Less rolling together
Sleep through your partners disturbances and let them roll around guilt free on a mattress that isolates movement.
Two comfortable layers
They say two’s better than one, which is why your new mattress has been made with 2 layers – a cushiony layer on top and a firmer more supportive layer at the bottom.
Durability built in
Our mattresses are designed to give you 5 years of amazing everyday sleep – we’ve even backed it up with a 5 year warranty for peace of mind.
Zip off cover
Mistakes happen and should you spill your favourite cup of tea all over your new mattress, just unzip the cover and clean it with ease – simple!
Out of this world performance!
Welcome to the cooler side of the pillow. Perfect for increasingly warmer summers and fiendishly cold winters – our AeroFresh® Cool Memory Foam mattress retains less heat in the summer, whilst remaining perfectly cozy throughout winter. Adapting to every curve of your body, our AeroFresh® Cool Memory Foam mattress gives a plush cushiony feel with plenty of support. We spend 1/3 of our life in bed so this is for those who intend to love every second!
30x
More Airflow
Enhanced breathability
Our latest generation of ComfiCel® Cool Memory Foam has been enhanced to provide up to 30x more airflow than traditional memory foam, providing our best ever mattress for a fresher, cooler nights sleep.
Both breathability and airflow are significantly improved by increasing the openness of each individual cell. This allows the body to better regulate temperature, promoting a higher quality, deeper nights sleep.
Helps you maintain an optimal core temperature
Deep sleep is important for processing the days activities and converting them into memories, helping us to better learn and retain new information. It’s also during this time when the body repairs its muscles and tissues. Studies show that higher body temperatures lead to less deep sleep, which means if you’re overheating at night, you’re more likely to wake up feeling unrefreshed.
The AeroFresh® performance layer is enriched with natural heat conductors which help to draw away excess body heat. This helps you maintain a more optimal core temperature, which can be linked to increased levels of deep sleep and better recovery.
FlexiDRY® Fabric
The FlexiDRY® fabric provides our best ever temperature control and moisture wicking. FlexiDRY® actively responds to changes in temperature. As body heat rises, molecules inside the fabric begin changing shape, which increase how moisture is wicked away and evaporated.
This means, any unwanted moisture will dissipate away much faster, resulting in a cooler, drier you!
The flexible 4-way stretch design works harmoniously with the rest of the mattress, adapting to your every curve and contour, eliminating resistance.
The science of a good nights sleep
A good nights sleep is important and can be linked to a longer, healthier life. The ComfiCel® range combines cutting edge technology, with innovation and creativity so you stay wonderfully comfortable all night long. Compared to more traditional mattress materials, you can expect improved durability, better freedom to roll and most importantly – a better nights sleep!
Compare our mattresses
If you’re unsure which mattress will be the best fit for you, the table below offers a quick side by side comparison of our key models. It highlights the main differences in performance and materials so you can make a confident choice.
If you’d like more personalised guidance, our team is always happy to help and feel free to contact us for tailored recommendations.
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5 year warranty
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Suitable for daily use
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Removable cover
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Reduces pressure points
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Supportive base layer
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ComfiCel® next gen foams
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Faster to respond
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Sleeps cooler
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Enhanced pressure relief
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You’ll love what we can do in the bedroom
How to measure your new mattress
When taking measurements, you can measure your bed frame or existing mattress. For the very best results however, we recommend measuring the bed frame in line with the guidance offered below:
Is your mattress enclosed?
If your mattress sits inside a frame or in-between walls, we recommend ordering a width and length 2CM smaller than the space it fits in. This gives a 1CM gap all the way round, perfect for tucking in sheets with ease!
Does your mattress sit freely on top of a base?
If your mattress isn’t enclosed (such as on a divan bed), then there’s no need to make any reductions to your measurements and you will get the best finish by going with exact dimensions.
What thickness should you order
Looking for the best night’s sleep?
If you have no restrictions on height, we recommend a depth of 20cm (8 inches) for ultimate comfort.
Need a thinner mattress?
If a thinner mattress is required, please follow the guidance below:
- 12cm or less: Upgrade to a firm feel for improved support
- 13cm and above: Read our guide on “weight considerations”
Which firmness rating should you order?
Regardless of your chosen firmness rating, the top layer of your mattress will remain the same. This means you’ll still enjoy the same level of comfort and pressure relief that you’d expect up top.
When you upgrade to a firmer feel, the bottom layer is swapped for a more supportive, higher density foam. This helps to provide you with a better level of support, as well as preventing you from sinking into the mattress as much.
For those that like their mattress to have a little more ‘give’, the standard firmness rating is usually the preferred choice.
Weight considerations
Under 15 stone?
If you weigh less than 15 stone, you can opt for any firmness rating providing your mattress has a thickness of 13cm or above. If thickness is less than 13cm, we recommending upgrading to our firmer feel for enhanced support.
Over 15 stone?
If you weigh 15 stone and above (but less than 20 stone), be sure to upgrade to our firmer feel for enhanced support.
Weigh more than 20 stone?
If you weigh more than 20 stone please contact us to discuss your requirements.
Ask an expert
We’re passionate about sleep and our experts are ready to answer any questions you might have.
Gavin
Ask an expert
We can make mattresses to any shape or size, so let us know what you’re looking for and we’ll be in touch with a quote!
Gavin
Custom size mattresses built for comfort
We don’t believe in taking shortcuts, which is why every mattress we make is crafted with materials that have been carefully curated for their comfort, quality and durability. Your comfort is our passion and we’ve got an excellent reputation and have been providing custom size mattresses for 13+ years.
Pressure relieving
Old fashion springs push against your body with equal force meaning pressure points are inevitable. Our mattresses are different and distribute body weight more evenly, whilst reducing pressure … ah, now thats better.
Cloud like support
Our mattresses provide a ‘just right’ level of support, perfect for a wide range of different sleepers. If you’re heavier than 15 stone (or just prefer a firmer mattress) be sure to upgrade to the firmer feel so you stay properly supported.
Less rolling together
Sleep through your partners disturbances and let them roll around guilt free on a mattress that isolates movement.
Two comfortable layers
They say two’s better than one, which is why your new mattress has been made with 2 layers – a cushiony layer on top and a firmer more supportive layer at the bottom.
Durability built in
Our mattresses are designed to give you 5 years of amazing everyday sleep – we’ve even backed it up with a 5 year warranty for peace of mind.
Zip off cover
Mistakes happen and should you spill your favourite cup of tea all over your new mattress, just unzip the cover and clean it with ease – simple!
Original |
Better |
Best |
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|---|---|---|---|
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Customer reviews
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5 year warranty
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✓
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✓
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✓
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Suitable for daily use
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✓
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✓
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✓
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Removable cover
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✓
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✓
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✓
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Reduces pressure points
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✓
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✓
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✓
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Supportive base layer
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✓
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✓
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✓
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ComfiCel® next gen foams
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✗
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✓
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✓
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Faster to respond
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✗
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✓
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✓
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Sleeps cooler
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✗
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✗
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✓
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Enhanced pressure relief
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✗
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✗
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✓
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Full description
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The science of a good nights sleep
A good nights sleep is important and can be linked to a longer, healthier life. The ComfiCel range combines cutting edge technology, with innovation and creativity so you stay wonderfully comfortable all night long. Compared to more traditional mattress materials, you can expect improved durability, better freedom to roll and most importantly – a better nights sleep!
You’ll love what we can do in the bedroom
Any shape or size
No matter what shape or size you need, we’ve got a solution. Let us worry about the hard work, whilst you put your feet up and relax.
Easy to install
Gone are the days of wrestling with your new mattress trying to persuade it onto the bed. The future is here, and its vacuum packed!
British made
Designed and manufactured in the UK by our sleep experts, feel proud you’re supporting the British economy as you snuggle down onto the best mattress you’ve ever owned.
1,000’s of happy customers
We’re experts when it comes to customer satisfaction, so we already know you’ll love sleeping with us and we can’t wait to show you what we’re all about.
Free & fast delivery
We’ll deliver your mattress in as little as 4 working days. What’s better, delivery is free of charge if you provide us with a mainland UK address. View current lead times
Excellent customer service
You can expect a fast response from our enthusiastic team of experts when you get in touch! What’s better, call us and you’ll speak to a real person.
Island shape mattresses
Island mattresses reign supreme in the world of caravans, motorhomes, and boats. With a design tailored to allow for easy access all the way around the footend of the bed, these mattresses fit well within these confined spaces, offering an ideal solution for those seeking optimal rest on the move.
Unlike mattresses with two rounded corners cut away, island mattresses ditch the flat edge at the bottom, opting instead for a complete semi-circle. This distinctive feature helps to maximise space in the gangways.
Crafted with precision and expertise, our island mattresses cater exclusively to the needs of boat owners, as well as those who own caravans or motorhomes. From the gentle sway of the waves to the open road, island mattresses provide you with comfort wherever your journey takes you.
Displaying all reviews.
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★
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Delivery times:
All products are made to order and as a result delivery dates can vary. View current lead times
Delivery information:
Our couriers typically deliver Monday - Friday between 8AM - 6PM. Read more about delivery
Free Mainland UK delivery:
We offer free mainland UK delivery on most orders, although some geographical restrictions apply. Read more about delivery charges
Suitability:
When ordering it's important you consider suitability. Read more about suitability
Caring for your new mattress:
To help get the best out of your new mattress we have put together a care guide which must be followed. View our care guide
Warranty:
In the unlikely event your new mattress develops a fault, we've got your back! This mattress is covered by a 5 year limited warranty. View full information
Returns:
Please click here to view our returns policy
Full Terms & Conditions:
Click here to read our full terms and conditions which apply to all orders.
As we continually develop and update our product range, there may be instances where products of the same name or same specification differ in appearance and / or feel as our access to raw materials change. If you've ordered with us previously and are expecting a like for like product please contact us before ordering to discuss how we can accommodate your requirements - please note this may result in extended lead times. Custom Size Beds reserves the right to change any material used in the manufacturing process at any time. While we endeavour to ensure all information is accurate and all pictures are an accurate representation of our actual products, variations in size, design or colour may occur.
Pillows / bedding and bed frames shown are sold separately.
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