Sealy Ortho Plus Gold Mattress
Mattress
Sealy Ortho Plus Gold Mattress
Size
Firmness
Construction
Depth (cm)
29
Layers
3
Layer Details
- Cover. A breathable Belgian damask fabric cover, which means air can move through the sleep surface rather than getting trapped. That helps if you tend to run warm at night.
- Comfort Fillings. 100% polyester fillings that offer good recovery and durability. In practice that means the comfort layer springs back into shape rather than developing body impressions quickly.
- Support System. PostureTech CS springs respond to your body weight, targeting key areas to give deep-down support where you need it most. The springs are twice tempered, a heat treatment that helps them keep their tension over time.
Layer details from mattressnextday.co.uk product page, September 2026.
- A shared size for typical rooms: At 135 x 190cm, the UK double leaves space for bedside tables on both sides in most bedrooms, where a UK king can start to dominate.
- Firm feel across both halves: PostureTech CS springs respond to each sleeper's weight, which means a lighter partner isn't rolled towards a heavier one on the shared surface.
- Edges you can actually use: EdgeGuard foam firms up the sides, useful at 67.5cm each because couples inevitably sleep closer to the edge than solo sleepers do.
- Easier to turn than bigger sizes: This is a double-sided mattress you flip to even out wear, and the UK double is the most manageable of the shared sizes to turn.
- Bedding is simple: Standard double sheets and a 200 x 200cm duvet fit, and both are stocked everywhere at every price point.
This size suits you if...
You're a couple who wants a firm, turnable sprung mattress and your bedroom sits around the typical UK size, or you sleep alone and want proper spreading-out room, perhaps with a dog or cat claiming a corner. It also makes sense for a guest room that hosts visiting couples, since the firm feel and sturdy edges cope well with different sleepers passing through.
Consider another size if...
You or your partner is tall, or 67.5cm each feels tight after years of sharing. The UK king is 15cm wider and 10cm longer; we'd recommend it if your room allows at least 2.7m x 2.9m.
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Is the UK double Sealy Ortho Plus Gold big enough for a couple?
For most couples, yes. You each get 67.5cm of width, which is the long-standing UK standard for two sharing. The firm PostureTech CS springs help here, as you're less likely to roll towards each other than on a softer mattress. If either of you is a restless sleeper or broad across the shoulders, the UK king gives 15cm more width.
What size room do I need for the Sealy Ortho Plus Gold double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That leaves walking space on both sides and room for bedside tables, which matters for couples who each want a lamp and a phone charger within reach. In a smaller second bedroom, check you can still open wardrobe and drawer doors fully.
Can one person flip the Sealy Ortho Plus Gold UK double?
It's a double-sided, hand-tufted sprung mattress, so it needs turning to even out wear, and at 135 x 190cm the UK double is the smallest couples' size to handle. One reasonably strong person can manage it by rotating first, then flipping, but two people make the job quicker and safer. It's noticeably easier than turning a UK king.
Will a UK double fit up narrow stairs in an older house?
The mattress measures 135 x 190cm, or 4ft 6in x 6ft 3in, and as a traditional tufted sprung design it won't fold or squash the way foam can. Before ordering, measure your stairwell, any turns and the landing. In older terraces with a tight dog-leg staircase, the double is usually the largest size that goes up without a struggle.
Should a couple choose this mattress in a UK double or a UK king?
The UK double suits typical UK bedrooms and gives 67.5cm each, enough for most couples. The UK king is 15cm wider and 10cm longer, so it's the better pick if either of you is tall or you want more elbow room, but you'll need a room of at least 2.7m x 2.9m. Compare prices for both using the retailers listed on this page.