4' Small Double Mattresses

What Size is a 4ft Small Double Mattress?

A 4'0 small double mattress, also known as a three-quarter mattress, measures 120cm x 190cm (4 feet wide by 6 feet 3 inches long). This size sits comfortably between a standard single and a full double, offering extra width without demanding the same floor space as a 4'6" mattress. It’s a popular solution for spare rooms, shared spaces, guest bedrooms, or solo sleepers who like a little extra wiggle room.

Because the small double mattress shares the same length as most UK sizes, it fits standard bed frames and can easily be upgraded from a single without reconfiguring your room. Want to compare all standard dimensions? Visit our Mattress Size Guide to explore every UK size side-by-side.

Who is a Small Double Mattress Best For?

The small double bed mattress is ideal for anyone who needs a roomier sleep surface than a single, but doesn’t have the floor space for a full double or king. It’s especially suited to:

• Teenagers or young adults who have outgrown their single
• Solo sleepers who move around at night or just need more room
• Spare rooms or fitting a double into smaller bedrooms
• Landlords & HMO owners furnishing their properties, providing their tenants with doubles and maximising room space

It’s often used in second bedrooms, compact new builds, city apartments, and rental setups. If you’re after a middle ground between space-saving and sleeping comfort, a small double mattress UK is the smart choice.

Small Double Mattress for Sale – Best Value for Money

Looking for a cheap small double mattress without compromising on comfort? Browse our Bed & Mattress Sale Page for seasonal offers. Alternatively, below is our recommended 4' options, which offer exceptional value across different sleep preferences and budgets:

Visco Therapy Medium or Firm Mattress

A low cost reflex and memory foam mattress, available in medium or firm tension to suit a variety of sleepers. Edge to edge surface to make the most out of 4' and shallow enough to be usable on most children's beds.

Deep Sleep Camberley Antibacterial Mattress

An excellent choice for spare rooms, due to its price, all round comfort and Tencel fabric. The breathable and antimicrobial properties of Tencel will help maintain a clean and fresh sleep environment, perfect for alternating guests.

Shakespeare Lily 1000 Medium Memory Foam Mattress

A well built comfortable memory foam and pocket sprung mattress which is ideal for teenagers, older individuals and priced well enough to be a better quality spare room mattress.

Nectar Memory Foam Mattress

An all foam model from a top-tier mattress brand with advanced foam layers that provide pressure relief and that “floating” feel, suitable for both side and back sleepers or anyone needing joint support.

Small Double Mattress UK – Designed for Compact Comfort

Every mattress in this range is made to fit standard UK bed frames and divans. The 120cm width makes it easy to transition from a single or upgrade a spare room into a multi-functional guest space. Whether it’s for a student rental, a narrow new build, or a spare bedroom, small double mattresses offer that extra sleep space whilst still remaining compact.

Need a specific size? Many of our models are available in custom sizes and can be made to suit your requirements. Contact contact our team for more details 01227 765544 or email sales@beds4us.com

What Are the Best Types of Small Double Mattresses?

Here are the most suitable mattress types for small doubles, depending on your needs:

• Memory Foam Mattresses – Ideal for solo sleepers or couples who want layers of body-contouring comfort and reduced motion transfer
• Traditional Spring Mattresses – Classic open coil spring units, a more affordable option for spare rooms, teenagers and solo sleepers
• Pocket sprung Mattresses – Plenty of options with multiple different types available. Responsive support, comfortable and added breathability, great for everyday sleeping.
• All Foam Mattresses – Consistent edge to edge support with foam models, which helps make the most out of your space. Usually lower in price and ideal for kids and teenagers
• Childrens/Teenagers Mattresses – Ideal for growing bodies in mind, combining comfort and support for individuals starting to need more space.
  

If you’re still browsing or comparing options, explore our full Mattresses collection by type, firmness or feature.

Explore Other Mattress Sizes

Not sure if a small double is right for you? Check out our full range of standard UK sizes:

• 2'6 Small Single Mattresses
• 3'0 Single Mattresses
• 4'6 Double Mattresses
• 5'0 King Size Mattresses
• 6'0 Super King Mattresses
  

Need Help Choosing the Right Small Double?

From supportive orthopaedic models to breathable pocket sprung styles, we’ve got a 4'0 mattress for every situation. If you’re still unsure or need help finding the best fit, our team is happy to help.

📞 Call us on 01227 765544

📧 Email sales@beds4us.com

💬 Or chat with us live via the website