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Sealy Alston Gel Advantage Pillow Top Small Double Mattress
Sealy

Sealy Alston Gel Advantage Pillow Top Small Double Mattress

The Sealy Alston Gel Advantage Pillow Top Mattress combines a Geltex breathable comfort layer with a pillow top, which means extra surface cushioning on a medium-rated mattress, with less trapped heat.

  • Cushioned pillow top surface
  • Breathable gel comfort layer
  • Reinforced edges for steadier sides
£899

£589

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Size: Small Double. Available at Mattress Online

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Where can I buy the Sealy Alston Gel Advantage Pillow Top Small Double Mattress?

Below are the best prices for the Sealy Alston Gel Advantage Pillow Top Mattress in a Small Double. Available from (9) trusted retailers.

Sealy Alston Gel Advantage Pillow Top Mattress

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Prices last checked:
30th October 2026

Mattress dimensions for the Sealy Alston Gel Advantage Pillow Top Small Double Mattress

Length: 190cm

Width: 120cm

(4ft x 6ft 3in)

Minimum room size: 2.4m x 2.8m

Mattress details

Mattress Details for the Sealy Alston Gel Advantage Pillow Top Small Double Mattress

Mattress

Sealy Alston Gel Advantage Pillow Top Mattress

Size

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

Firmness

Medium

Construction

  • Foam

  • Gel

Depth (cm)

29

Layers

Layer Details

Key benefits

Key Benefits of the Sealy Alston Gel Advantage Pillow Top Small Double Mattress

  • Room to spread out alone: The UK small double is 30cm wider than the UK single, so a solo sleeper can turn and stretch across the pillow top without hitting the edge.
  • Kinder to a compact room: It is 15cm narrower than the UK double, which can be the difference between a bedroom door opening fully and catching the frame.
  • Steadier edges where you'll use them: In a small room you often sit on the bed to dress, and the high-density Edge Guard border should keep that edge feeling firm under you.
  • Same length as a standard double: At 190cm long it matches the UK double, so swapping down to a UK small double saves width without losing legroom.
  • Easy to dress: Small double (4ft) fitted sheets fit, and a standard double duvet covers it with a little overhang on each side.

Who should buy the Sealy Alston Gel Advantage Pillow Top Small Double Mattress?

This size suits you if...

You sleep alone but feel cramped on a single, perhaps a teenager who has outgrown one in a room that can't spare much floor. Or you're furnishing a guest room or loft conversion where couples stay only occasionally and a full double would crowd the space.

Consider another size if...

You share a bed every night, because two adults will find 120cm tight over time. We'd recommend the UK double instead, which gives 67.5cm each; we suggest at least 2.6m x 2.8m for that room.

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FAQ's

Frequently Asked Questions About the UK Small Double

Is the Sealy Alston Gel Advantage Pillow Top UK small double big enough for two?

It works for couples on an occasional basis, such as guests staying for a weekend. For nightly sharing, most couples will want more width. The UK double is 15cm wider and gives 67.5cm each for two sharing, with the same length.

What size bedroom do I need for a UK small double Sealy Alston mattress?

We suggest allowing at least 2.4m x 2.8m for a UK small double. That leaves space to walk around the bed and open the door. In a loft conversion with sloping ceilings, measure the floor area where you can actually stand, not the full footprint.

What sheets fit a Sealy Alston pillow top in a UK small double?

Look for small double (4ft) fitted sheets, and a standard double duvet will cover it. The mattress is 29cm deep including the pillow top, so check the sheet packaging states it fits that depth before buying, or the corners may pop off.

Small double or double Sealy Alston Gel Advantage: which should I choose?

Both are 190cm long, so the choice comes down to width and room size. The UK small double is 15cm narrower and suits one sleeper or a tight room. Choose the UK double if two of you will sleep on it nightly, and allow at least 2.6m x 2.8m.

Is a UK small double long enough for a tall person?

The UK small double is 190cm long, the same as the UK single and UK double. If you are tall and often find your feet near the end, the UK small double is 10cm shorter than the UK king, so sizing up to the UK king adds length as well as width.