Sealy PosturePedic Denison Combination Double Mattress
Sealy

Sealy PosturePedic Denison Combination Double Mattress

The Sealy PosturePedic Denison Combination Mattress has a very firm feel and Eco ComfortCore foam for hip and lower back support, which means you rest on top of the mattress rather than sinking into it.

  • Supports hips & lower back
  • Cool-to-the-touch surface
  • Cover endorsed by Allergy UK

£1,499

Size: Double. Available at Dreams

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Where can I buy the Sealy PosturePedic Denison Combination Double Mattress?

Below are the best prices for the Sealy PosturePedic Denison Combination Mattress in a Double. Available from (9) trusted retailers.

Sealy PosturePedic Denison Combination Mattress

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Prices last checked:
6th November 2026

Mattress dimensions for the Sealy PosturePedic Denison Combination Double Mattress

Length: 190cm

Width: 135cm

(4ft 6in x 6ft 3in)

Minimum room size: 2.6m x 2.8m

Mattress details

Mattress Details for the Sealy PosturePedic Denison Combination Double Mattress

Mattress

Sealy PosturePedic Denison Combination Mattress

Size

UK Double (4ft 6in x 6ft 3in)

Firmness

Extra Firm

Construction

  • Foam

Depth (cm)

28

Layers

Layer Details

Key benefits

Key Benefits of the Sealy PosturePedic Denison Combination Double Mattress

  • A shared size that leaves floor space: At 135 x 190cm, the UK double leaves room for a wardrobe and drawers in a room where a UK king would crowd everything else.
  • Firm edges help a narrower bed: The UniCased edge support system is designed to keep the sides supportive, which means each of you can use your full 67.5cm, right out to the edge.
  • One firm feel for both of you: Two back sleepers who both want an Extra Firm surface will find the UK double gives them the same flat, supportive feel on each side.
  • A cool top for two warm bodies: The graphite foam top layer feels cool to the touch, which helps a little when two people share a UK double and the heat builds up.
  • Bedding is easy to find: Double sheets and a 200 x 200cm double duvet fit, so you can dress the bed without hunting for unusual sizes.

Who should buy the Sealy PosturePedic Denison Combination Double Mattress?

This size suits you if...

You share the bed with a partner who also likes a very firm, flat surface, and your bedroom is at least 2.6m x 2.8m. It also suits you if you're setting up a guest room for visiting couples, or furnishing a first flat where the bed has to sit alongside a wardrobe and drawers.

Consider another size if...

You and your partner find 67.5cm each a squeeze, or one of you sprawls. We'd recommend the UK king instead, which gives 75cm each; allow at least 2.7m x 2.9m for the UK king.

FAQ's

Frequently Asked Questions About the UK Double

Will a UK double Sealy Denison fit in my bedroom?

We suggest a room of at least 2.6m x 2.8m for the UK double, with around 3m x 3m feeling comfortable. In a smaller room, check whether bedside tables still fit on both sides and whether wardrobe doors can open fully before you buy.

Is a double Sealy Denison big enough for two people?

A UK double gives 67.5cm each for two sharing. That suits couples who sleep fairly still and both like an Extra Firm feel. If either of you spreads out, the UK king gives 75cm each, which is 7.5cm more per person.

Sealy Denison double or king for a couple?

The UK king is 15cm wider and 10cm longer than the UK double. Choose the UK double if your room is under 2.7m x 2.9m, which is our suggested minimum for the UK king. Choose the UK king if you have that space and either of you is tall.

Is the UK double Sealy Denison long enough for tall people?

The UK double is 190cm long, which is 6ft 3in. Taller sleepers may find their feet near the end. The UK king and UK super king are both 10cm longer, so they are better options if height is a concern.

Will a double Sealy Denison go up narrow stairs?

At 135 x 190cm and 28cm deep, the UK double is a large, stiff item to carry. Before ordering, measure turning stairs in an older terrace or a tight landing in a new build, then compare the retailers listed on this page.