Romantica Serenade Ortho King Size Mattress
The Romantica Serenade Ortho is a firm open coil mattress, 25cm deep, with soft white fibre fillings over a traditional interlaced spring system.
- Firm support that spreads your weight
- Damask cover won't trap heat
- Suits spare rooms & guest beds
£219
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Romantica Serenade Ortho Mattress
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Mattress details
Mattress
Romantica Serenade Ortho Mattress
Size
Firmness
Firm
Construction
Orthopaedic
Depth (cm)
25
Layers
3
Layer Details
Comfort Layer
Soft white synthetic fibres sit at the top, which means a cosy surface feel rather than a sink-in one. They're durable and resilient, so the layer should hold its shape over time.
Support System
Traditional open coil springs are interlaced in a lattice design, which means the whole surface works together to spread your weight evenly. That helps relieve built-up pressure and supports spinal alignment, though it does mean more motion transfer than pocket springs if you share the bed.
Cover
A finely woven damask cover finishes the mattress, soft to the touch and built to last. It doesn't retain heat, which hot sleepers will appreciate.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- More room each: You get 75cm each for two sharing, which is 7.5cm more per person than the UK double and enough to stop elbows meeting halfway through the night.
- Length for taller sleepers: At 200cm, or 6ft 6in, it is 10cm longer than the UK double, which means feet stay on the mattress rather than hanging off the end.
- Some buffer from a restless partner: The lattice springs carry movement across the surface, so the extra width helps by keeping you further apart, although it will not fully isolate a partner who tosses and turns.
- Firm support across a wider surface: The interlaced coils work as one unit, which means your weight is spread evenly even when two people of different builds share the bed.
- Cooler for two: Two bodies make a bed warmer, and the woven damask cover does not hold on to heat, which helps if either of you runs hot.
This size suits you if...
You share the bed every night and have begun to feel squeezed on a UK double, one of you is close to or over six foot and needs the extra 10cm of length, or you want more space between you because your partner gets up hours before you do.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once wardrobes are in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Will my partner's movement wake me on the Romantica Serenade Ortho UK king?
It might, if you are a light sleeper. Open coil springs are joined together, so movement travels further than on pocket springs. The UK king helps by giving you 75cm each, 7.5cm more per person than the UK double, which puts a little more distance between you. It reduces disturbance slightly rather than removing it.
Is the Serenade Ortho UK king long enough if you're over 6ft?
For most tall sleepers, yes. The UK king is 200cm long, or 6ft 6in, which is 10cm longer than the UK double, UK small double and UK single. If one of you is over six foot, that extra length is often a bigger improvement than the added width.
Will a Romantica Serenade Ortho UK king fit in a new build master bedroom?
Measure after the wardrobes and bedside tables are in, because new build rooms often feel smaller than the plans suggest. We suggest at least 2.7m x 2.9m for a UK king, and 3.2m x 3.2m if you want to walk round the bed comfortably. If you fall short, the UK double needs at least 2.6m x 2.8m.
How much space does each person get on a Serenade Ortho UK king compared with a double?
On the UK king you each get 75cm. On the UK double it is 67.5cm each, so the UK king gives you 7.5cm more per person. That sounds modest on paper, but couples who move from a double usually notice it most when turning over or getting up without nudging the other person.
Is a Serenade Ortho UK king big enough for two people and a dog?
It gives more room than a UK double, but a dog that sleeps across the middle will still eat into your 75cm each. The firm open coil surface stays supportive under the extra weight. If the dog is large and on the bed every night, a smaller room may not be the limit, but your own space will be.