Sleepeezee Tranquil 1200 King Size Mattress
Sleepeezee

Sleepeezee Tranquil 1200 King Size Mattress

The Sleepeezee Tranquil 1200 is a medium firm pocket spring mattress, available in five UK sizes from Single to Super King.

  • Medium-firm feel suits most sleepers
  • Firm edges, use the full width
  • Minimises partner disturbance

£881.10

Size: King Size. Available at Mattress Man

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Where can I buy the Sleepeezee Tranquil 1200 King Size Mattress?

Below are the best prices for the Sleepeezee Tranquil 1200 Mattress in a King Size. Available from (9) trusted retailers.

Sleepeezee Tranquil 1200 Mattress

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Prices last checked:
11th November 2026

Mattress dimensions for the Sleepeezee Tranquil 1200 King Size Mattress

Length: 200cm

Width: 150cm

(5ft x 6ft 6in)

Minimum room size: 2.7m x 2.9m

Mattress details

Mattress Details for the Sleepeezee Tranquil 1200 King Size Mattress

Mattress

Sleepeezee Tranquil 1200 Mattress

Size

UK King (5ft x 6ft 6in)

Firmness

Medium Firm

Construction

  • Pocket Spring

Depth (cm)

Layers

Layer Details

Key benefits

Key Benefits of the Sleepeezee Tranquil 1200 King Size Mattress

  • More room each than a double: Each sleeper gets 7.5cm more width than on a UK double, which means a slightly wider gap between you and fewer accidental nudges in the night.
  • Extra length for taller sleepers: At 6ft 6in long, the UK king is 10cm longer than a UK double, so a partner over six foot can stretch out without heels hanging off the end.
  • Less disturbance from an early riser: The 1,200 individually moving springs, combined with the extra width, mean one partner getting up before dawn should cause less movement on the other side.
  • Usable right to the edges: Edge-to-edge encapsulated springs firm up the perimeter, which means each of you can use your full 75cm rather than drifting toward the middle.
  • A step up without a super king room: You get noticeably more personal space than a double, while needing a smaller floor area than a UK super king, which we suggest at least 3m x 2.9m for.

Who should buy the Sleepeezee Tranquil 1200 King Size Mattress?

This size suits you if...

You share the bed every night and keep waking each other on a double, or one of you is tall enough that length matters as much as width. It also fits if your working hours differ and you want the early riser's alarm and exit to disturb the other person a little less.

Consider another size if...

Your bedroom is smaller than our suggested 2.7m x 2.9m. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.

FAQ's

Frequently Asked Questions About the UK King

Is the Sleepeezee Tranquil 1200 king size long enough for someone over 6ft?

The UK king is 200cm long, or 6ft 6in, which is 10cm longer than the UK double. For a partner around or just over six foot, that extra length gives room for a pillow and a bit of stretch at the foot. If extra length is your main reason for upgrading, the UK super king is no longer than the UK king.

Will I feel my partner move on the Tranquil 1200 in a UK king?

You should feel less than on a smaller size. The 1,200 springs move independently, and the UK king gives you each 75cm, so there is more distance between you. This helps when one of you gets up for work hours before the other, although you may still notice a heavier partner turning over.

Sleepeezee Tranquil 1200 king vs double: how much more space do you get?

The UK king is 15cm wider and 10cm longer than the UK double. Shared between two, that works out at 75cm each on the UK king against 67.5cm each on the UK double, so 7.5cm more per person. It sounds modest, but a difference you notice most when both of you sleep on your sides.

Should a couple choose the Tranquil 1200 king or super king?

The UK super king gives 90cm each, so the UK king gives you 15cm less each. The UK king suits most couples who want a clear step up from a double. If you often share the bed with a dog or a restless child, the UK super king may be the better fit, provided your room allows at least 3m x 2.9m.

Will a Tranquil 1200 UK king fit a new build master bedroom?

Measure after your wardrobes and bedside tables are in, as new build rooms often feel smaller once furnished. We suggest allowing at least 2.7m x 2.9m for the UK king, which leaves space to walk around both sides. If your room falls short, the UK double needs at least 2.6m x 2.8m.