When it comes to achieving quality sleep, size really does matter. Whether you sleep solo or share your bed, the dimensions and materials of your mattress can affect your comfort and rest. A small double mattress memory foam offers a cozy and space-saving option, while a standard double gives you that extra width for stretching out.
Choosing between these two can be tricky, especially when both feature luxurious memory foam layers that adapt to your body. This guide breaks down the difference between a small double memory foam and a standard double memory foam so you can find the perfect fit for your room, lifestyle, and sleep needs.
What Is a Small Double Memory Foam Mattress?
A small double mattress memory foam is often referred to as a “three-quarter” mattress in the UK. It’s larger than a single but smaller than a double, offering the perfect middle ground for solo sleepers who like extra space or couples in compact rooms.

Key Features of Small Double Memory Foam Mattresses:
- Dimensions: 120 cm x 190 cm (approximately 4ft x 6ft3)
- Ideal for small bedrooms or guest rooms
- Made with responsive memory foam layers that contour to your body
- Available in medium to firm feels for balanced comfort
- Compatible with small double bed frames and divans
A small double memory foam provides a comfortable and affordable upgrade from a single without taking up too much floor space.
What Is a Double Memory Foam Mattress?
A double memory foam is the UK’s standard size for couples or those who love extra room. Measuring 135 cm x 190 cm (4ft6 x 6ft3), it’s wider than a small double and gives both sleepers more personal space.

Key Features of Double Memory Foam Mattresses:
- Ideal for two adults or spacious solo sleeping
- Better motion isolation and support due to wider structure
- Enhanced memory foam layers that relieve pressure points
- Works with standard double bed frames
- Great for master bedrooms or larger spaces
Size Comparison: Small Double vs Double Memory Foam Mattress
| Feature | Small Double Mattress Memory Foam | Double Memory Foam Mattress |
|---|---|---|
| Dimensions | 120 x 190 cm | 135 x 190 cm |
| Best For | Solo sleepers or smaller rooms | Couples or larger bedrooms |
| Space Requirement | Compact – fits smaller rooms | Requires more floor space |
| Comfort Level | Cozy and snug | Roomy and spacious |
| Price Range | Slightly more affordable | Moderately higher |
| Ideal Users | Teenagers, singles, guest rooms | Couples, adults, main bedrooms |
Comfort and Sleeping Experience
Both types of mattresses offer the same memory foam technology, designed to adapt to your body shape and provide pressure relief. However, your comfort experience depends on how much space you prefer while sleeping.
Small Double Mattress Memory Foam
- Best for solo sleepers who roll around a lot
- Provides a “snug” comfort, with close body support
- Ideal for compact bedrooms or studio apartments
Double Memory Foam Mattress
- More spacious, allowing couples to move freely
- Excellent motion isolation reduces partner disturbance
- Suitable for those who prefer stretching out while sleeping
If you’re sleeping alone and space is limited, the memory foam small double is a practical choice. But if you share your bed, the double will deliver more comfort.
Memory Foam Construction and Support
Both small double and double memory foam mattresses share similar build quality, but their performance may differ slightly due to size.
Common Layers:
- Comfort Layer: Soft viscoelastic memory foam that contours to your body.
- Support Core: High-density foam base for durability and spinal alignment.
- Breathable Cover: Often removable and washable for easy maintenance.
Key Benefits:
- Even weight distribution to prevent pressure buildup.
- Enhanced comfort for side, back, and combination sleepers.
- Noise-free performance compared to spring mattresses.
Whether you choose a small double bed with memory foam or a standard double, both support posture correction and promote healthy sleep.
Which Mattress Is Best for Different Room Types?
| Room Type | Recommended Mattress | Why It Works |
|---|---|---|
| Small Bedroom | Small Double Mattress Memory Foam | Saves space while providing comfort |
| Guest Room | Memory Foam Small Double Mattress | Compact and cozy for occasional use |
| Teenager’s Room | Small Double Memory Foam Mattresses | Ideal transition from single to double |
| Master Bedroom | Double Memory Foam Mattress | Perfect for couples and long-term use |
| Studio Flat | Mattress Small Double Memory Foam | Space-efficient yet luxurious |
Factors to Consider Before Buying
Before choosing between a small double memory foam and a double, consider these essential factors:
1. Room Size
Measure your room before purchase. Leave at least 50 cm of space around the bed for movement and furniture.
2. User Needs
If you sleep solo and move a lot, the small double is perfect. For couples, a double mattress ensures uninterrupted sleep.
3. Budget
A small double memory foam costs slightly less than a double due to size, but both deliver long-term value.
4. Bed Frame Compatibility
Ensure your frame matches the mattress dimensions. For example, a small double bed and memory foam combination enhances performance and lifespan.
5. Material and Firmness
Choose a firmness level that suits your sleep position:
- Soft to Medium: Side sleepers
- Medium-Firm: Back sleepers
- Firm: Stomach sleepers
Durability and Longevity
A high-quality memory foam small double can last 8–10 years with proper care. However, durability also depends on density, usage, and maintenance.

Tips for Longer Lifespan:
- Rotate your mattress every 3–6 months.
- Use a breathable mattress protector.
- Keep it on a ventilated base to prevent moisture buildup.
- Avoid folding or bending the foam layers.
Advantages of a Small Double Mattress Memory Foam
- Compact and ideal for limited spaces.
- More affordable than a double.
- Perfect for singles, teens, or guests.
- Same high-quality comfort as larger models.
- Easy to move or transport.
Advantages of a Double Memory Foam Mattress
- Offers more room for couples.
- Reduces partner disturbance during sleep.
- Adds a luxurious feel to larger bedrooms.
- Provides superior comfort for multiple sleep positions.
Which Should You Choose?
If you value space efficiency, go for the small double memory foam. It’s an excellent choice for singles or smaller rooms. But if you share your bed or prefer extra space, the double memory foam offers unbeatable comfort and flexibility.
Quick Decision Guide:
| Preference | Best Choice |
|---|---|
| Solo sleeper with small room | Small Double Mattress Memory Foam |
| Couple or shared bed | Double Memory Foam Mattress |
| Teenager’s upgrade | Small Double Mattress Memory Foam |
| Long-term comfort | Double Memory Foam Mattress |
Final Thoughts
Both small double and double memory foam mattresses provide premium support, contouring comfort, and long-term durability. The decision largely depends on your room space, sleep habits, and whether you share your bed.
If your goal is to maximize comfort without sacrificing space, the small double memory foam mattress delivers the best of both worlds compact design with plush sleep comfort.
FAQs
It can work for two people, but it’s best suited for one adult or a teenager due to its limited width.
With good care, it can last 8–10 years. Rotating it and using a mattress protector helps extend its lifespan.
Yes, it’s ideal for compact rooms or apartments where a standard double may feel too large.
The comfort quality is the same, but the double offers more room to move, making it better for couples.