Double Mattresses

A double mattress measures 135cm by 190cm (4ft 6in x 6ft 3in), the most popular UK size and a comfortable fit for couples or solo sleepers who like room to move.

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What size is a double mattress?

A double mattress measures 135cm wide by 190cm long, or 4ft 6in by 6ft 3in. It is the most popular UK mattress size. A standard UK double is always 4ft 6in wide, so “double” and “4ft 6” mean the same thing. It is 15cm wider than a small double and 15cm narrower than a king. European doubles are different again, usually 140cm by 200cm, so check your frame if it was made outside the UK.

For every UK size in one place, see our UK bed and mattress size guide.

Is a double mattress big enough for two people?

Yes. A double comfortably fits two people and is the most popular size for couples. Each person gets about 67cm of width, which is a little narrower than a single bed each. If you or your partner are tall, move a lot in the night, or want more personal space, a king size mattress adds 15cm of width. For one sleeper, a double gives plenty of room to spread out.

What are the different types of double mattresses?

We stock double mattresses in every filling type, so you can match the feel to how you sleep.

  • Double memory foam mattresses mould to your body and ease pressure on the hips and shoulders, so they suit side sleepers.
  • Double pocket sprung mattresses use individually wrapped springs for targeted support with little disturbance between partners.
  • Double hybrid mattresses combine springs and foam for support with some cushioning.
  • Double latex mattresses are naturally breathable, hypoallergenic and provide responsive support and temperature regulation.
  • Double gel mattresses are infused with cooling gel technology to regulate body temperature and provide pressure-relieving comfort throughout the night.
  • Double orthopaedic mattresses offer firmer support for back and joint pain, and
  • Double open coil traditional mattresses give firm, reliable support at a lower price, good for guest rooms.
  • Double eco friendly mattresses use sustainable fillings like bamboo and wool and are at a more affordable price.

If you’re unsure which type you need, you can come visit us in person! Our showroom in West Yorkshire has all of our mattresses for you to see and even lie on before buying.

What firmness should I choose for a double mattress?

Firmness is how soft or supportive the surface feels, and the right level depends on your position and weight. Side sleepers tend to prefer a double soft mattress. Back and stomach sleepers, and heavier sleepers, are usually better on a firm mattress. If you are unsure, a double medium firm mattress is the most popular choice and works for most people and most couples.

Which double mattress is best, and how do I choose?

There is no single best double mattress, only the one that fits how you sleep. Your sleeping position, your weight and whether you share the bed matter more than price alone.

Side sleepers usually want a softer surface that cushions the hips and shoulders. Back and stomach sleepers, as well as heavier sleepers, tend to need firmer support that keeps the spine level. Couples are often best on a pocket sprung or hybrid double mattress, where the springs move on their own and limit disturbance when one of you turns over. If you are still weighing it up, our guide to choosing a mattress walks through it step by step.

How thick is a double mattress?

A standard double mattress is usually 20 to 30cm (8 to 12 inches) thick though depth varies by model. Our double mattresses range from slim foam designs under 20cm, best for bunk beds or lighter use, to deep pocket sprung at standard depths for most beds and pillow top builds starting at 30cm for extra support. If you’re ever curious, the depth and height is listed on each product page. A deeper mattress is not automatically more supportive, so choose on feel and filling rather than height alone.

Which double mattress brands do you stock?

We stock doubles from trusted British and European brands. These include Sweet Dreams and Flair Furnishings for traditional pocket sprung and orthopaedic builds, Dormeo for memory foam and cooling technology, SleepShaper for orthopaedic support, Noomi for eco friendly bamboo and latex, and Maxitex, Komfi, Apollo Beds, Myer Adams and Westminster Beds across the value and premium ranges. Whether you want cooling foam, firm support or a natural filling, there is an option to match.

How much should you pay for a good double mattress?

A good double mattress usually costs between £150 and £800, and most everyday adult mattresses sit in the £300 to £500 range. Price tracks the materials and build, not the size.

Budget models from around £80 to £150 use open coil springs or basic foam, which suit guest rooms and children. Mid range models from £150 to £400 cover most pocket sprung, memory foam and hybrid mattresses for daily use. Above £400 you move into higher spring counts, natural fillings and cooling technology.

At Bed Kingdom, double mattresses start from £79.99. Our price match guarantee means that if you find the same mattress cheaper elsewhere, we will match it, and 0% APR finance is available on approved credit, so you can spread the cost. To see current reductions, browse our mattress sale.

How long does a double mattress last?

Most double mattresses last around seven to eight years, though this depends on the type, quality, and how they are used. Signs it is time to replace yours include sagging, lumps, aches when you wake, or broken sleep. Rotating your double mattress every few months helps it wear evenly and last longer. When you do upgrade, our guide to getting rid of an old mattress covers the free and easy disposal options.

Can I buy a double mattress and bed together?

Yes. You can pair any double mattress with a matching double bed frame, or shop our divan bed and mattresses, where the base and mattress are sometimes sold together. Buying both at once is the simplest option when you are furnishing a room from scratch.

Can I add a double mattress topper or protector?

Yes. A double mattress topper adds a layer of comfort or a little extra depth to an existing mattress, and a mattress protector guards against spills and everyday wear. Both come in the 135cm by 190cm double size to match your mattress.

How fast will my double mattress be delivered?

Every double mattress comes with free delivery across the UK within 1-7 working days, and next day delivery is available on selected models. Many are vacuum packed and rolled for easy handling. You are also covered by our price match guarantee and 0% APR finance on approved credit.

If you have any questions, our FAQ page may help, or you can contact our customer service team.