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Hypnos Iona King Size Mattress
Hypnos

Hypnos Iona King Size Mattress

The Hypnos Iona Mattress pairs ReActivePro 7-turn pocket springs with two rows of hand-sewn side-stitching, which means support that carries right to the edge of the bed.

  • Edge-to-edge border support
  • Certified organic natural materials
  • Hand-tufted & handcrafted build
£4,499

£4,049

Save £450

Size: King Size. Available at Feather & Black

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Where can I buy the Hypnos Iona King Size Mattress?

Below are the best prices for the Hypnos Iona Mattress in a King Size. Available from (9) trusted retailers.

Hypnos Iona Mattress

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Prices last checked:
13th November 2026

Mattress dimensions for the Hypnos Iona 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 Hypnos Iona King Size Mattress

Mattress

Hypnos Iona Mattress

Size

UK King (5ft x 6ft 6in)

Firmness

Construction

  • Eco-Friendly

  • Latex

  • Natural

  • Pocket Spring

  • Wool

Depth (cm)

27

Layers

Layer Details

Key benefits

Key Benefits of the Hypnos Iona King Size Mattress

  • More room each than a UK double: Each sleeper gets 75cm of width, 7.5cm more than in a UK double, which means a little more space to turn over without rolling into your partner.
  • Length for a tall partner: At 200cm, or 6ft 6in, the UK king is 10cm longer than a UK double, so a partner over six foot can stretch out without heels resting on the border.
  • Edges you can sleep on: Two rows of hand-sewn side-stitching support the border, which means the outer part of each 75cm half stays usable instead of sloping away beneath you.
  • Space for pregnancy pillows: If you're pregnant and sleeping propped among pillows, the wider surface gives them somewhere to sit without nudging your partner towards the far edge.
  • Fits rooms a super king won't: We suggest at least 2.7m x 2.9m for the UK king, compared with the 3m x 2.9m we'd allow for the UK super king.

Who should buy the Hypnos Iona King Size Mattress?

This size suits you if...

You share every night and keep meeting in the middle of a UK double, one of you is over six foot and tired of feet reaching the end, or your alarms go off hours apart and a little more distance would help the later riser stay asleep.

Consider another size if...

Your bedroom falls short of our suggested 2.7m x 2.9m once wardrobes and bedside tables are in. We'd recommend the UK double instead, which we suggest for rooms of at least 2.6m x 2.8m.

FAQ's

Frequently Asked Questions About the UK King

Is the Hypnos Iona UK king big enough for two adults?

For most couples, yes. The UK king gives you 75cm each, which is 7.5cm more per person than a UK double. If you both sprawl or share the bed with a dog most nights, the UK super king gives 90cm each, although it needs a larger room.

Is a Hypnos Iona UK king long enough if you're over 6ft?

At 200cm (6ft 6in), the UK king is 10cm longer than the UK double, which is the main reason tall sleepers choose it. The UK super king is the same length, so if length is your only concern, sizing up beyond the UK king won't give you any more of it.

What size bedroom do I need for a Hypnos Iona king size mattress?

We suggest at least 2.7m x 2.9m, with around 3.2m x 3.2m feeling comfortable. Measure after the furniture is in, because a new build master bedroom can lose a surprising amount of floor once fitted wardrobes take up a wall.

Hypnos Iona UK king or UK super king if we disturb each other at night?

The UK super king gives 90cm each, 15cm more per person than the UK king, so there's more distance between you when one partner gets up early. It needs at least 3m x 2.9m, though. If your room can't take that, the UK king's supported edges help you make full use of its width.

What bedding fits the Hypnos Iona in a UK king?

Standard UK king sheets and a 230 x 220cm king duvet fit the 150 x 200cm surface. The Iona is 27cm deep, so check that the fitted sheet you choose has deep enough pockets to tuck securely under the mattress.