Small Double Memory Foam Mattresses

Why choose a small double memory foam mattress?

A small double memory foam mattress offers pressure-relieving comfort in a space-saving size. Measuring 4ft wide, it’s ideal for smaller bedrooms, guest rooms and solo sleepers who want more room than a single mattress provides. 

Memory foam gently contours to your body, helping to support your sleeping position and reduce pressure on key areas. It can also absorb movement, making it a practical choice for couples sharing a compact bed.

How to choose the right small double memory foam mattress

A small double memory foam mattress should make a compact bedroom more comfortable without taking up too much floor space. Start by measuring the room and bed frame, then compare firmness, foam depth, edge support and cooling features.

Think about how often it will be used, too. A teenager sleeping on it every night may need a different level of support from an occasional guest, while couples sharing a 4ft mattress should prioritise motion isolation and a supportive edge. 

Why shop at MattressNextDay?

Next day delivery - Available on eligible in-stock mattresses throughout mainland UK.

Lowest price promise - Compare trusted memory foam mattresses with price reassurance.

Old mattress removal - We’ll take away your old mattress when we deliver the new one.

Excellent reviews - Read verified reviews from customers before making your choice.

Award-winning retailer - Buy from a three-time NBF Online Bed Retailer of the Year.

British-designed quality - Explore British-designed mattresses made using carefully chosen materials.

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Buying guidance for small double memory foam mattresses

Small double vs standard double: Is a 4ft mattress right for you?

A small double memory foam mattress measures 120cm x 190cm, or 4ft x 6ft 3in. It gives you 30cm more width than a single while taking up 15cm less room than a standard double.

Choose a small double if a single feels restrictive and a standard double makes the room feel cramped. Pair it with a 120cm x 190cm small double bed frame or base, as a standard double frame will be too wide.

Choosing the right firmness for your 4ft memory foam mattress

The right firmness depends on your sleeping position, body weight and how much cushioning you prefer. Memory foam can feel different from one mattress to another, so check the comfort rating, foam depth and support layers on each product page before you choose.

Your body weight will also affect how firm the mattress feels. Lighter sleepers may prefer more cushioning, while heavier sleepers may find a firmer option gives them steadier support.

The benefits of memory foam for space-saving beds

Memory foam moulds around your shape and spreads pressure across the mattress. This close cushioning may suit side sleepers who want more give around their shoulders and hips, as well as anyone who enjoys a body-hugging feel.

It also absorbs movement well. On a small double, where sleepers are naturally closer together, this can reduce how much you notice a partner shifting position during the night.

Edge support matters more on a narrow mattress because you’re more likely to sleep close to the side. A supportive perimeter helps you use more of the 120cm width and can make the edge feel steadier when you sit down. 

Delivery, recycling, and guarantees

Free next-day delivery to most locations - Get your new mattress quickly, with free next-day delivery available across mainland UK on in-stock memory foam mattresses.

Free weekend delivery - Select an available weekend slot and arrange for your mattress to arrive at a more convenient time.

Choose a delivery date - Pick a suitable date at checkout to plan around work, moving home or replacing your current mattress.

Learn more about our delivery and returns policies. 

We make old mattress disposal easy for you

Just £39 to responsibly dispose of your old mattress - Add mattress removal at checkout and MattressNextDay will collect your old mattress when your new one is delivered.

100% of your mattress is reused and recycled - Your old mattress is separated into its core components so the raw materials can be repurposed into new products instead of going to landfill.

A greener way to get rid of your old mattress - Skip the hassle of organising disposal yourself with a convenient recycling service designed to work around your needs.

Find a great value small double memory foam mattress

Searching for the right mattress at a great price? Shop the latest MattressNextDay sale and compare deals across trusted brands, popular sizes and a range of comfort grades. Shop mattress sale.

Ask the expert about small double memory foam mattresses

Choosing a mattress is easier when you know what to compare. Our product experts answer common questions about small 

double memory foam mattresses, including size, edge support, and delivery.

Martin Seeley, Product Expert at MattressNextDay, answers questions about small double memory foam mattresses.

What size is a small double memory foam mattress?

A small double memory foam mattress measures 120cm x 190cm, or 4ft x 6ft 3in. It’s 30cm wider than a single and 15cm narrower than a standard double.

How much should I spend on a small double memory foam mattress?

Small double memory foam mattresses vary in price, giving you options for occasional guest rooms, teenagers’ bedrooms and everyday adult use.

At the lower end of the range, you’ll find practical memory foam comfort for spare rooms or lighter use. Spending more can give you deeper foam layers, stronger edge support, cooling features, more advanced support systems and longer guarantees, which may be worth considering if the mattress will be slept on every night.

Memory foam vs. pocket sprung or hybrid: Which is best for a 4ft bed?

Who is a small double memory foam mattress best for?

A small double memory foam mattress is a useful upgrade for a teenager who has outgrown a single bed. It gives them more room to change position while leaving valuable floor space for a desk, storage or other bedroom furniture.

It’s also a great choice for a compact guest room. Memory foam creates a cushioned, welcoming feel without requiring the footprint of a full double, which works well when the room also serves as an office or storage space.

A 4ft mattress may suit:

• Teenagers moving up from a single bed

• Solo adults wanting more room in a small bedroom

• Box rooms and compact guest rooms

• Studio apartments where every centimetre counts

Two adults can share a small double, although it will feel more compact than a standard double. Memory foam can make sharing easier by absorbing movement when one person turns over or gets out of bed.

Can two adults sleep on a small double memory foam mattress?

Two adults can share a small double memory foam mattress, although it will feel more compact than a standard double. It may work well where space is limited or for occasional use, while a double or king-size mattress will usually feel roomier for two people every night.

Memory foam absorbs movement well, which can help when sleepers are close together. Look for supportive edges too, as these make more of the 4ft surface feel usable.

Can I use standard double bedding on a small double mattress?

Some standard double bedding can be used, but small double bedding will give you the neatest fit. A standard double fitted sheet is made for a 135cm-wide mattress, so it may feel loose or bunch around a 120cm small double.

Choose a fitted sheet labelled 4ft or small double and check its pocket depth against your mattress. A standard double duvet can still work well if you prefer more coverage.

Why is edge support important on a small double memory foam mattress?

Edge support helps you use more of the mattress surface, which is particularly valuable when the bed is only 120cm wide. A firmer edge can make sleeping near the side feel steadier and may reduce the sense of rolling towards the perimeter.

It can also make sitting on the mattress easier. Compare products with reinforced edges or a supportive foam core if the mattress will be shared or used every night.

Will a small double memory foam mattress feel too hot?

Memory foam can feel warmer than a pocket sprung mattress because its dense structure sits closer around the body. The exact feel varies, so look for open-cell foam, cooling gel, ventilation channels or a breathable cover if temperature is a concern.

Lighter bedding and a well-ventilated room can also help create a fresher sleep setup. Check the individual product features before choosing.

Can I get next day delivery on a small double memory foam mattress?

Yes, all in-stock memory foam mattresses are available with free next day delivery across the UK mainland. See the delivery page or individual product pages for the latest information.