Choosing between a double and a king size bed comes down to a balance of sleep quality and available floor space. A standard UK double bed measures 4ft 6in (135cm) wide, which is efficient for smaller rooms but offers each person less space than a single bed. A king size bed provides an extra 6in (15cm) in width and 4in (10cm) in length, measuring 5ft by 6ft 6in (150cm by 200cm). This extra room significantly reduces sleep disturbance from a partner moving during the night. If your bedroom layout allows for a 2ft (60cm) walkway on both sides of the frame, the king size is usually the better investment for long‑term comfort.
What This Means In Practice:
The jump from a double to a king size might seem small on paper, but it fundamentally changes the feel of your bedroom. In a double bed, two adults are often forced into the centre, which can lead to overheating and restless nights. The king size gives you that crucial bit of breathing room. However, you must account for the frame dimensions rather than just the mattress size. Many frames have wider edges or chunky headboards that can make a king size feel overwhelming in a compact room.
Opting for a king size over a double is primarily about personal space, and a bed frame like the Mila highlights that difference. While a standard double can feel cramped for two adults, the 5ft king size dimensions of the Mila provide the extra width needed to move freely without waking a partner. Also, the asymmetrical headboard and copper blush basket weave fabric make it a significant feature in a larger bedroom.
Quick Facts:
• A standard UK double bed is 4ft 6in wide and 6ft 3in long (135cm x 190cm).
• A standard UK king size bed is 5ft wide and 6ft 6in long (150cm x 200cm).
• King size beds are better for taller people due to the extra 4in (10cm) length.
• Double beds are the standard choice for guest rooms and smaller master bedrooms.
• King size frames provide much more substantial internal storage in ottoman models.
• A king size duvet on a king size bed helps prevent tug‑of‑war at night.
Who This Is Best For:
A double bed is the right choice for the starter or the renter who needs to maximise floor space. It is ideal for individuals who want more room than a single or couples who are happy with a closer sleeping arrangement. A king size bed is better for those who prioritise a restorative night’s sleep without being disturbed by a partner. It suits households with larger bedrooms where the bed can act as a main feature without blocking access to wardrobes or doors.
Pros and Cons:
Pros
• Double beds fit into almost any bedroom layout and are easier to move.
• King size beds offer significantly more individual space for couples.
• Extra length in a king size prevents feet from hanging off the edge.
• More storage volume is available if choosing an ottoman king size base.
Cons
• King size frames can make a small room feel cramped and difficult to navigate.
• Beddings and mattresses for king size beds are generally more expensive.
What To Consider Before Buying:
The golden rule is to measure your room and then measure it again. Map out the footprint of a king size frame using masking tape on the floor. You need to ensure you can still open your wardrobe doors and that you are not blocking any radiators or electrical sockets. Think about the height of the people using the bed. If you are over six feet tall, the extra 4in (10cm) of a king size is almost essential for comfort. Finally, consider how you like to sleep. If you move around a lot, the extra width will keep you from waking up your partner.
Buying Checklist:
• Measure the room width to ensure a 2ft (60cm) gap on both sides of the bed.
• Check that wardrobe doors and drawers have full clearance to open.
• Verify the length of the room to account for the extra 4in (10cm) of a king size.
• Test your current mattress to see if the lack of width is the cause of poor sleep.
• Ensure the headboard height does not block windows or wall lights.
• Confirm that a king size bed and mattress can be delivered through your hallways and stairs.
Common Mistakes To Avoid:
• Forgetting that the bed frame is always slightly larger than the mattress.
• Choosing a king size bed but having no room for bedside tables.
• Buying a king size bed for a room with limited access, making delivery difficult.
• Sticking with a double bed when you have the space and budget for a king.
• Not checking the duvet size. A king size bed usually needs a super king duvet for the best look.
Expert Advice By Furniture Outlet’s Interior Stylists Jo & Liz:
“When you are stuck between the two sizes, look at your furniture. If you have to sacrifice a bedside table to fit a king size bed, it usually is not worth it. A double bed with two tables looks more balanced and is more practical for daily life. However, if you have the space, a king size in a bold fabric like the copper blush weave can make a room feel more like a hotel. We suggest using warm tones for the frame to keep a larger bed from dominating the room visually. If the room is narrow, go for a frame with a slim footboard to keep the walkway feeling open.”
Care Note:
Whether you go for a double or a king size bed, rotate your mattress every three months to ensure even wear. For fabric bed frames, a quick vacuum with an upholstery tool once a month will keep the material looking fresh. If you have an ottoman base, lift it periodically to keep the gas struts in good working order.
Shop 4ft6 Double or 5ft King Size Beds:
Why Buy Your Bed at Furniture Outlet
We specialise in providing quality beds that fit the reality of modern homes. Our collection includes both double and king size options in a variety of finishes to suit any style. We focus on sturdy frames and reliable mechanisms so you get a bed that lasts. Because we hold our stock in our own warehouses, we can offer fast delivery across London and Essex, so you can upgrade your sleep without the wait.
Try Before You Buy
The best way to decide is to see the beds in person. Walk around the different frames at any of our five retail store locations to get a true sense of their size. It allows you to see how much floor space a king size frame actually takes up compared to a double, and you can check the height and reach of the headboards.
Explore our latest bedroom arrivals online to find the double or king size frame that completes your space. We have plenty of styles ready for immediate dispatch.
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