Small Double Mattresses (4ft)

Why choose a small double mattress?

A small double mattress is ideal when a single feels too narrow, but a double would make the room feel cramped. It gives one sleeper more room to turn over, stretch out and get comfortable, without taking up as much floor space as a standard double.

It can work well in box rooms, spare rooms, studio flats and teenage bedrooms. For couples, it can be suitable for occasional use, but it will feel more compact than a double or king size.

How to choose the right small double mattress

A small double mattress is all about balance: Enough sleeping space to feel comfortable, but enough floor space left for the room to work properly. Before choosing, think about who will use it, how often they will sleep on it and how much room you need around the bed.

Then compare:

• Firmness: Medium and medium-firm mattresses can suit a wide range of sleepers, while firm options may appeal if you prefer a steadier surface.

• Mattress type: Pocket sprung mattresses feel responsive and breathable, while memory foam offers closer cushioning. Hybrid designs combine springs with foam comfort layers.

• Depth: Check the mattress depth if you are using a low-profile frame, cabin bed or compact divan, as a deeper mattress can change the finished bed height.

• Support: For pocket sprung options, around 800 springs or more can be a useful starting point for everyday support, but comfort layers and firmness matter too.

• Room fit: Measure the space around the bed, not just the bed frame. You still need room to open wardrobes, drawers and the bedroom door comfortably.

Why shop at MattressNextDay?

Next day delivery - Choose an eligible in-stock small double mattress and get free next-day delivery across the UK mainland.

Lowest price promise - Compare trusted small double mattresses with extra price reassurance before you order.

Old mattress removal - Add old mattress removal at checkout and make replacing your mattress easier on delivery day.

Excellent reviews - Read verified customer reviews to compare comfort, service and delivery before you buy.

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

British-designed quality - Choose British-designed mattresses built with carefully selected materials.

Need help choosing your next mattress?

Tell us who the mattress is for, how much room you have and the feel you prefer. MattressFinder™ will help narrow the range to mattresses that suit your sleep needs. Find your perfect mattress.

Buying guidance for small double mattresses

What size is a small double mattress?

A small double mattress measures 120cm x 190cm, or 4ft x 6ft 3in. It gives one sleeper more room than a single, without taking up as much floor space as a standard double.

This makes it a useful size for compact bedrooms, teenagers, guest rooms and studio flats. Before choosing one, measure more than the bed frame. Check that doors, drawers and wardrobes can still open easily, and that there is enough space to walk around the bed without the room feeling blocked.

Small double vs double: Which size should you choose?

Choose a small double if the room is tight, the bed is mainly for one sleeper or you want a guest bed that does not dominate the space. Choose a standard double if two people will share regularly and the room can comfortably fit the extra width.

A small double can work for two people occasionally, but it will feel compact. If it will be shared often, look for a mattress that feels steady from side to side, with good edge support and comfort layers that suit both sleepers.

What type of small double mattress should you choose?

Choose pocket sprung if you want a mattress that feels breathable and easier to move on. Memory foam may suit you if you prefer closer cushioning, while hybrid mattresses combine springs with foam comfort layers.

For everyday use, focus on comfort, firmness, support and depth rather than choosing by mattress type alone.

Delivery, recycling, and guarantees

Free next-day delivery to most locations - Get your new mattress quickly with free next-day delivery across the UK mainland for in-stock mattresses.

Free weekend delivery - Choose a weekend delivery slot, if available, so your mattress arrives at a time that works for you.

Choose a delivery date - Pick your preferred delivery date at checkout to make it easier to plan around work, moving day, or replacing an old 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 old mattress removal at checkout, and MattressNextDay will take care of your old mattress when your new one arrives.

100% of your mattress is reused and recycled - Every mattress is broken down into its core components and the raw materials are repurposed. Instead of ending up in a landfill, 100% of your old mattress is transformed into new products.

A greener way to get rid of your old mattress - Avoid the hassle of arranging disposal yourself and choose a recycling service designed to be convenient and to work around your needs.

Find a great value small double mattress

Looking for the right mattress at the right price? Explore the latest MattressNextDay sale and compare offers on trusted brands, popular sizes and different comfort grades. Shop mattress sale.

Ask the expert about 4ft small double mattresses

Choosing a mattress is easier when you know what to compare. Our sleep experts answer common questions about small double mattresses, including 4ft sizing, UK queen size terminology, room fit, couples, mattress depth and delivery.

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

Is a small double the same as a queen size mattress?

In the UK, shoppers sometimes use 'queen size' when they are looking for a small double or three-quarter mattress. However, size names can vary between countries and retailers.

Always check the exact measurements before ordering. At MattressNextDay, a small double mattress means 120cm x 190cm.

Is a small double mattress the same as a three-quarter mattress?

Yes, a small double mattress is often called a three-quarter mattress. Both usually refer to the same 4ft size: 120cm x 190cm.

Is a small double mattress big enough for two people?

It can be, but it depends how often two people will use it. A small double can work for occasional sharing, guest rooms or compact flats, but it will feel narrower than a standard double.

For regular use by two people, a double or king size mattress will usually feel more comfortable if the room allows.

What type of small double mattress is best?

The best type depends on how you want the mattress to feel. Pocket sprung mattresses feel responsive and breathable, memory foam mattresses feel closer and more cushioned, and hybrid mattresses combine springs with foam comfort layers.

If the mattress will be used every night, focus on comfort, support, firmness and mattress depth rather than choosing by type alone.

What depth should a small double mattress be?

The right depth depends on the bed frame and how high you want the finished bed to feel. A deeper mattress can feel more cushioned, but it can also make a low bed frame, cabin bed or compact divan feel higher.

Check the bed frame guidance before ordering, especially if the mattress is for a raised frame or smaller room.

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

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