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Small Double Mattresses

Browse our range of small double mattress options designed for UK bedrooms where space matters. Also known as a 4ft small double mattress, this size measures 120x190 small double mattress dimensions, giving you extra width compared to a single while keeping a slimmer footprint than a standard double.

This collection is suitable for solo sleepers who want more room to stretch out, teenagers moving up from a single, and couples looking for a compact everyday setup. It’s also a practical choice if you’re furnishing a spare room and want a bed that can comfortably host guests without dominating the space.

To help you compare options, you’ll find popular build types including a small double pocket sprung mattress for responsive support and reduced partner disturbance, plus a small double hybrid mattress for a mix of spring support and foam comfort. You can also narrow down by feel, such as a medium firm small double mattress, or choose an orthopaedic-style option for extra spinal support.

Each mattress includes key specifications and sizing details, with many models made in the UK by Mattress Depot for consistent fit and finish.

54 products

The Ultimate Small Double Mattress Buying Guide

Key Takeaways:

Key Takeaways: Details
Space-Saving Efficiency: A small double mattress provides ample room for solo sleepers and a cozy fit for couples, making it ideal for smaller UK bedrooms.
Precision Support: Choosing a medium firm small double mattress offers the most versatile support level, suitable for back, side, and stomach sleepers.
Specialised Comfort: If you suffer from joint pain, a small double orthopaedic mattress provides targeted spinal alignment and pressure relief.
Direct-to-Consumer Value: By buying a UK made small double mattress directly from Mattress Depot, you eliminate middlemen costs while receiving a BS7177 certified product.

Comparison – Small Double Mattress vs. Standard Double

Understanding the footprint of your bed is essential for room flow and sleep quality. Below is a comparison of how the 4ft small double compares to its larger counterpart.

Feature Small Double (4ft) Standard Double (4ft 6in)
Dimensions (cm/in) 120 x 190 cm / 4'0" x 6'3" 135 x 190 cm / 4'6" x 6'3"
Ideal For Small bedrooms, guests, teens Standard bedrooms, couples
Space Required Min. 2.5m x 3m room Min. 3m x 3m room
Couples Use Occasional/Cozy fit Recommended for daily use

Who Should Choose a Small Double Mattress?

A 4ft (120x190) small double mattress is designed for homes where space matters, but comfort still comes first. Here is who benefits most:

  • Couples with Compact Bedrooms: Space is at a premium in many modern UK homes. The 4ft size is the best small double mattress for couples who need to reclaim floor space for wardrobes or walkways without reverting to a single bed.
  • Guest Room Maximisers: Installing a small double mattress for guest rooms ensures you can host two people comfortably while keeping the room feeling airy and functional when guests aren't staying.
  • Growing Teenagers: Moving from a single to a 120x190 small double mattress is a significant upgrade for teens, providing much-needed extra width for a more "grown-up" sleep environment.
  • Back Pain Sufferers: A small double orthopaedic mattress is specifically engineered for those requiring extra lumbar support, ensuring that even in a smaller size, your spine remains perfectly aligned.

Specifications & Dimensions Guide

Every UK made small double mattress we produce follows standardised dimensions to ensure compatibility with UK bed frames.

Size Name Metric (cm) Imperial (ft/in) Best For...
Small Double 120 x 190 cm 4ft x 6ft 3in Box rooms and guest suites
Double 135 x 190 cm 4ft 6in x 6ft 3in Standard master bedrooms

Small Double Firmness Matrix

Selecting the right feel is critical for long-term comfort. At Mattress Depot, we offer various tensions to suit your body type.

Sleeping Position Body Weight <70kg Body Weight 70-95kg Body Weight >95kg
Side Sleeper Soft / Medium Medium Medium Firm small double mattress
Back/Stomach Medium Medium Firm Firm / Small double orthopaedic mattress

Note: A medium firm small double mattress is a common “safe choice” for shared beds and guest rooms because it supports a wide range of sleepers.

Materials & Construction

At Mattress Depot, our 20+ years of manufacturing expertise go into every layer of your mattress.

  • The Support Core: Our small double pocket sprung mattress options feature individual springs encased in fabric pockets. This allows each spring to move independently, contouring to your body and preventing "roll-together" when sharing the bed.
  • The Comfort Layers: Our small double hybrid mattress range utilizes a blend of reflex foam or memory foam atop the spring unit. These layers are designed for pressure relief, particularly around the shoulders and hips.
  • The Cover & Fabric: Every mattress is finished with BS7177 fire-retardant fabrics. Many feature breathable surfaces to help regulate temperature throughout the night.
  • Cooling Technology: For hot sleepers, we integrate breathable "Cool Blue" foam or graphite-infused layers that dissipate heat more effectively than traditional memory foam.

Why Buy a Small Double Mattress from Mattress Depot?

  • British Craftsmanship: Every UK made small double mattress is designed and manufactured in-house at our British facility, ensuring total quality control.
  • 100-Night Mattress Trial: We want you to be certain of your choice. Sleep on your new mattress for 100 nights to ensure it provides the restorative rest you need.
  • Direct Manufacturer Pricing: By eliminating middlemen and retail showrooms, we pass the savings directly to you, offering luxury comfort at fair, honest prices.
  • Certified Safety: Our materials are BS7177 and OEKO-TEX® certified, meaning they meet the highest UK safety and ethical standards.
  • Decades of Expertise: With over 20 years in the industry and 100,000+ happy sleepers, Mattress Depot is a trusted name in sleep innovation.
  • Eco-Conscious Delivery: We use sustainable packaging for our rolled mattresses, reducing the carbon footprint of your delivery.

How to Care for Your Small Double Mattress

  • Initial Setup: Once your mattress arrives, carefully remove the packaging and allow it to expand in a well-ventilated room for at least 4-6 hours before use.
  • Regular Rotation: To prevent dipping and ensure even wear, rotate your mattress 180 degrees every two weeks for the first three months, then once a month thereafter.
  • Use a Protector: We highly recommend using a mattress protector to shield the fabric from spills, sweat, and allergens, which helps maintain the integrity of the foam layers.
  • Cleaning Instructions: If a spill occurs, spot clean the area with a damp cloth and mild detergent. Do not saturate the mattress, as moisture can damage the internal foams and springs.
  • Warranty Compliance: Ensure your mattress is placed on a compatible, supportive bed frame. Using an unsuitable base can void your 5-year warranty (available on select models).

Frequently Asked Questions

A small double mattress measures 120cm wide by 190cm long (4ft x 6ft 3in). This makes it 15cm narrower than a standard double, making it a practical choice for smaller bedrooms or guest rooms

Yes, a small double mattress can accommodate two adults and is often chosen by couples with limited space. For long-term everyday use, some couples may prefer the extra width of a standard double if room size allows.

A small double pocket sprung mattress uses individual springs to provide responsive support and good airflow. A hybrid mattress combines pocket springs with foam layers, offering additional pressure relief while maintaining spring support.

A medium firm small double mattress is generally recommended for back pain as it balances comfort with spinal support. For more pronounced back issues, a small double orthopaedic mattress may offer firmer, targeted alignment.

No. A 120x190 small double mattress requires a 4ft small double bed frame. Using it on a standard double frame can cause gaps, movement, and long-term damage to the mattress.

Our mattresses are delivered rolled and vacuum-packed. This mattress-in-a-box format makes delivery easier through tight hallways and staircases before the mattress expands to its full size.

A UK made small double mattress meets strict British safety standards, including BS7177. Buying UK made also supports local manufacturing and reduces the environmental impact of international shipping.

Yes. We offer a 100-night trial on our small double mattress range, allowing you to test comfort and support in your own home before making a final decision.