Bed Size Guide for Couples: Choosing Together
Bed Size Guide for Couples: Choosing Together
Written by the Valtiva Team
Our Double vs King and King vs Super King guides cover room-size decisions in depth — this one focuses specifically on what the research says about sharing a bed with a partner.
The Real Research on Sharing a Bed
A widely cited University of Surrey study found that couples sleeping together reported roughly 50% more nighttime disturbances than when sleeping separately — even after accounting for other factors. Interestingly, the same research found that subjective sleep satisfaction was often still higher when sharing a bed, despite the objective disturbance data.
How Much Space Does Each Person Actually Need?
Sleep research suggests an adult needs roughly 90cm of width to move naturally without restriction during sleep. On a standard UK Double (135cm), that leaves each partner just 67.5cm — noticeably less than the research-suggested ideal, and less width than a single sleeper gets on their own Single bed.
Why Width Specifically Helps
More width reduces disturbance in two genuine ways: distance (movement has further to travel before it reaches your partner) and freedom (more room to shift position without physically bumping into each other).
A Growing Trend Worth Knowing About: "Sleep Divorce"
Recent research points to a genuine, growing pattern of couples choosing to sleep in separate rooms due to nighttime disturbance — sometimes called "sleep divorce." For couples who'd rather not go that far, a genuinely interesting middle-ground option exists in the wider market: two Single mattresses on a shared frame (sometimes called a "zip and link" system), letting each partner choose their own firmness while still sharing the same bed. Worth knowing this option exists, even if it's not something every retailer, including ourselves, currently offers as standard.
A Practical Way to Decide Together
- If you're currently on a Double and experiencing real nighttime disturbance, the research genuinely supports sizing up to King as a first step.
- If you're already on a King and still disturbed, Super King is the next real option — see our King vs Super King guide for the room-size reality check that comes with it.
- If your sleep schedules or firmness preferences are genuinely very different, it's worth having an honest conversation about whether a shared single surface is really the best fit.
Browse Sizes Together
Every VALTIVA collection offers King and Super King — browse Ottoman Storage Beds, Tall Headboard Beds, or see our full UK Bed Size Guide.
Deciding on a size together and want a second opinion? Get in touch — we're happy to help you both.