When it comes to buying a new bed, one of the first decisions you’ll face is choosing the right mattress size. In the UK, a double mattress is one of the most popular options, striking the perfect balance between comfort and practicality. It’s larger than a single, giving you more room to stretch out, but it’s also smaller than a king, meaning it won’t overwhelm your bedroom.
A double mattress is a great choice for a wide range of sleepers whether you’re a couple, a solo sleeper who loves extra space, or a parent buying for a teenager who’s outgrown their single bed. It is also a common choice for guest rooms, as it offers enough sleeping space without requiring a large bedroom.
Double Mattress Size Breakdown
One of the main reasons a double mattress is so popular is because it’s a standardised size in the UK. This makes it easy to find matching bed frames, sheets, duvets, and mattress protectors without much hassle.
Here’s a clear breakdown of the dimensions:
| Mattress Type | Imperial Size | Metric Size |
| Double | 4’6” x 6’3” | 137 cm x 190 cm |
So, the UK double mattress size is 4 feet 6 inches wide and 6 feet 3 inches long (137 cm x 190 cm).
To put it simply, this size is just about right for two average-sized adults who want a cosy night’s sleep or a single sleeper who loves extra space.
According to The Sleep Foundation, the size of your mattress can directly affect sleep quality, with restricted space leading to disrupted rest.
Why Choose a Double Mattress?
A double mattress is often referred to as the “versatile option” in bedding. Here’s why it continues to be a top choice for households across the UK:
- For Couples: While not as wide as a king, a double still gives enough room for two people to share a bed comfortably.
- For Singles: A single sleeper gets loads of extra space to spread out without the mattress feeling oversized.
- For Teenagers: A fantastic step up from a single bed, providing more room as they grow.
- For Guest Rooms: Large enough for visitors to sleep comfortably, yet small enough to fit into a standard-sized guest room.
- For Smaller Homes: Many UK bedrooms are modest in size, making a double mattress a space-efficient solution.
- If you’re still comparing mattress sizes, you can read our detailed guide to mattress sizes .
What is this mattress made of?
This mattress is carefully designed for comfort, support, and durability. On top, the premium quilted cover keeps you cool and dry by wicking away moisture. The Zero Gravity™ gel-infused memory foam gently cradles your body, while 1,400 FortiCoil™ micro pocket springs respond individually to your movements for pressure relief.
A natural blend of British wool and cotton adds breathability and softness. Beneath that, 2,000 EnduraSpring™ coils provide long-lasting support, stabilized by a firm layer of coir (coconut fiber). Open-cell breathable foams enhance airflow, and the outer fabric is fire-resistant and antimicrobial.
Double Mattress vs. Other Mattress Sizes
To help you understand where a double mattress fits in, let’s compare it briefly to other sizes:
- Single Mattress (90 cm x 190 cm) – Best for children or solo sleepers with limited room space.
- Small Double Mattress (120 cm x 190 cm) – Slightly smaller than a double, often called a “three-quarter bed.”
- Double Mattress (137 cm x 190 cm) – Standard size, ideal for couples or singles wanting more space.
- King Mattress (150 cm x 200 cm) – Wider and longer than a double, perfect for couples who want extra legroom.
- Super King Mattress (180 cm x 200 cm) – The largest UK size, offering hotel-style luxury at home.
This comparison shows how the double mattress sits right in the middle, making it the most versatile choice.
How Mattress Size Impacts Sleep
The size of your mattress isn’t just about fitting your room it also plays a big role in how well you sleep. If you and your partner feel cramped, you’re more likely to toss and turn throughout the night. On the other hand, if you have enough room to move freely, your sleep tends to be deeper and more refreshing.
The Sleep Charity points out that sleep quality is often tied to personal space. When people feel comfortable and unrestricted, they experience better rest.
So, if you’re a couple who likes cuddling up but also values space to roll over without bumping elbows, a double mattress could be the sweet spot.
Types of Double Mattresses
Not all double mattresses are the same. You’ll find a wide variety of options to suit your sleeping style and preferences:
- Memory Foam Double Mattress: Moulds to your body for excellent pressure relief.
- Hybrid Double Mattress: Combines memory foam and springs for balanced comfort.
- Orthopaedic Double Mattress: Designed for people with back or joint pain.
- Latex Double Mattress: Naturally hypoallergenic and breathable.
Each type has its pros and cons, so choosing the right mattress depends on your personal needs. If you’re unsure, explore our buying guide.
Conclusion
A double mattress size in the UK measures 4’6” x 6’3” (137 cm x 190 cm) and is one of the most popular bed sizes for good reason. It’s versatile, practical, and suits a wide range of sleeping needs from couples to single sleepers who enjoy extra space. It also fits well in average-sized UK bedrooms, making it the go-to choice for many households.
Whether you’re upgrading your own bed, furnishing a teenager’s room, or preparing for guests, a double mattress offers a comfortable and convenient solution.
If you’d like to browse different types of mattresses or find the perfect double mattress for your needs, head over to our product pages and discover the best fit for your lifestyle.
FAQs About Double Mattress Size
1. What’s the difference between a double and a king-size mattress?
A king-size mattress is larger, measuring 150 cm x 200 cm, while a double is 137 cm x 190 cm.
2. How much does a double mattress weigh?
It depends on the materials used. Foam mattresses tend to be lighter, while spring and hybrid mattresses can weigh anywhere between 40-43 kg.
3. Is a double mattress suitable for two adults?
Yes, it fits two average-sized adults comfortably, though couples who like extra space often prefer a king.
4. Can you use a double mattress for bunk beds or loft beds?
In most cases, no. Double mattresses are best for standard bed frames, but always check your frame’s weight and size limits.
5. How long does a double mattress last?
Most good-quality double mattresses last between 7–10 years, depending on usage and care.
6. What type of bed frame works best with a double mattress?
Standard wooden or metal double bed frames work perfectly. You can also find divan bases or storage bed frames designed for doubles.
7. Is a double mattress good for small rooms?
Yes, it’s the perfect balance between sleeping space and room space, especially in modest UK bedrooms.
8. Are double mattresses good for teenagers?
Absolutely. They provide plenty of growing room and often last well into adulthood.
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