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Mattress Sizes UK
October 1, 2025

The Complete Guide to King Mattress Size

When it comes to getting the perfect night’s sleep, choosing the right mattress size plays a huge role. Among all options, the king mattress size stands out as one of the most popular choices for couples and families. With its generous dimensions, it provides ample space to stretch out, move freely, and sleep without disturbances. The king mattress size is especially ideal if you share your bed with a partner, children, or even pets, as it offers both comfort and room to breathe.

In this guide, we’ll explore everything you need to know about the king mattress size from dimensions and comparisons to care tips so you can make the best choice for your bedroom.

What Is the “King Mattress Size”?

When mattress makers refer to a king mattress size, they typically mean a mattress that balances generous sleeping space with usability in many bedrooms. It is larger than a double bed, offering extra width and length for couples, families, or anyone who loves more sleeping space. The king mattress size is ideal for master bedrooms, giving comfort and room to stretch out without feeling crowded. The king size mattress is 150 cm × 200 cm (roughly 59″ × 79″).

King Mattress Size vs Other Standard Sizes

To better understand whether a king mattress size is right for you, it helps to see it in context. Here’s a comparative table showing how the king size stacks up:

Mattress Size Table
Mattress Type Dimensions (cm) Approx. in Inches Notes
Single / Twin 90 × 190 ~ 35.4″ × 74.8″ Ideal for one person, small rooms
Small Double / Queen (UK) 120 × 190 ~ 47.2″ × 74.8″ A bit wider than single
Double 135 × 190 ~ 53.1″ × 74.8″ Common “standard” couple’s size
King 150 × 200 ~ 59″ × 79″ The king mattress size
Super King 180 × 200 ~ 70.9″ × 79″ Wider than king by 30 cm (≈12″)

From that chart, you see that the king mattress size is comfortably larger than double size, but smaller than super king, often making it a good compromise between spaciousness and manageability.

Why Choose a King Mattress Size?

Here are several reasons many people opt for a king mattress size:

Why Choose King
  1. More personal space — You and your partner both get ample room to move around without disturbing each other.
  2. Good for children or pets — If kids or pets sometimes hop in, a king gives some buffer room.
  3. Versatile for many bedrooms — A super king may be too wide for many master rooms; a king often “fits just right.”
  4. Better for couples of differing sleep habits — If one person tosses and turns, they’re less likely to disturb the other.

Things to Check Before Ordering a King Mattress Size

To make sure a king mattress size works well for your space and lifestyle, here are key considerations:

  • Bedroom dimensions: Measure the room, allowing for space to walk around, open wardrobe doors, etc.
  • Bed base or frame: Ensure your bed base supports 150 × 200 cm.
  • Doorways, stairs, and corridors: Can the mattress be delivered through tight spaces?
  • Weight and handling: A king mattress will weigh more to check whether two people are needed to move it.
  • Bedding & accessories: Sheets, mattress protectors, and toppers must match the king dimensions.
  • Mattress firmness and construction: Even for the same size, materials (memory foam, hybrid, latex) will affect feel and performance.

According to the sleep foundation, it’s important to take other factors into account when choosing the right king mattress. These include not only mattress quality and performance, but also your budget, bedroom size, and even the logistics of moving the mattress.

Best King Mattress Models 

Here are a few mattress models that you can find in the king mattress size variant:

  • Luxe Organic Hybrid — available in king size (150 × 200 cm) as one of the options.
  • Majestic 9000 — listed in their size guide including king size 150 × 200 cm.
  • Luxe-Latex Natural Pillow Top — also offered with options including king size. 

According to sleep charity, always choose a mattress that feels comfortable for your body type

Tips for Using & Caring for a King Mattress Size

Once you have a king mattress size, here are tips to maximize comfort, longevity, and performance:

  • Rotate regularly — Even though some modern mattresses are one-sided, if yours is double-sided, flip/rotate it every few months.
  • Use a proper base — A sturdy bed frame or slatted base helps support the mattress evenly.
  • Protect with a mattress protector — Accidents and spills happen; protect your investment. According to sleep foundation , use a mattress protector and wash your sheets regularly to keep dirt, sweat, and allergens from seeping into the mattress.
  • Clean lightly — Vacuum occasionally; follow manufacturer recommendations for stains.
  • Mind temperature — Use breathable bedding to keep the mattress ventilated.
  • Follow warranty instructions — For example, some warranties require you to register and maintain the mattress.

Frequently Asked Questions (FAQs)

1. What exactly is the king mattress size in the UK?

In the UK, the king mattress size sold by Luxe is 150 cm × 200 cm (≈ 59″ × 79″).

2. How does the king mattress size compare to super king?

A super king is 180 × 200 cm. So a super king gives roughly 30 cm more width than a king mattress size. 

3. Is a king mattress size big enough for two people?

Yes, for most couples, a king mattress size gives plenty of space for two adults to sleep comfortably especially in the UK dimensions. The super king offers more, but often isn’t necessary.

4. Will king size bedding be easy to find?

Yes, because king mattress size (150 × 200 cm) is standard in the UK, you’ll find bedding, mattress protectors, toppers, and sheets to match without much difficulty.

5. Can I get a king mattress size in different materials or firmness?

Definitely. Luxe offers models like the Luxe Organic Hybrid and Luxe-Latex Natural Pillow Top in the king size format. You just choose the material and firmness you prefer at that size.

6. What to watch out for when buying a king mattress size?

Make sure your room and doorways can accommodate the king mattress size, check mattress base compatibility, confirm delivery logistics, and always verify the warranty terms. Also check whether the mattress is handlable by two people.

Conclusion

Choosing the right mattress size is one of the most important decisions for achieving quality sleep and creating a comfortable bedroom. The king mattress size (150 × 200 cm) strikes the perfect balance between spaciousness and practicality. It provides ample room for couples, families with kids, or even pets while still fitting comfortably in most bedrooms. Compared to smaller sizes, the king mattress size offers more personal space and comfort, without overwhelming your room like a super king might.If you’re considering upgrading to a king mattress size, exploring trusted options is key. You can visit Luxe Mattresses to find high-quality king mattresses designed for durability, comfort, and restful sleep.

Double mattress
September 25, 2025

What is a Double Mattress Size?

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

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 TypeImperial SizeMetric Size
Double4’6” 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 Gravityâ„¢ gel-infused memory foam gently cradles your body, while 1,400 FortiCoilâ„¢ 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 EnduraSpringâ„¢ 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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