Why Choose a King Size Bed?
A king size bed is a strong choice for couples who want more personal sleeping space than a standard double provides. It can also suit individual sleepers who value extra room and have a bedroom large enough to accommodate a wider frame.
The main benefit is space. A king size gives each sleeper more width, which can make the bed feel less restrictive during the night. It is especially useful for couples who move around while sleeping or prefer more separation between sleeping positions.
King size beds also create a more substantial focal point in a larger bedroom. If the room feels too spacious for a double, a king can help balance the layout without moving all the way up to a super king.
Before buying, however, measure carefully. A larger bed improves sleeping space only when the rest of the room remains practical. Wardrobe doors, bedside tables and normal walking routes should still be easy to use.
What Are the Standard King Size Bed Dimensions?
Standard UK king size bed dimensions are typically based on a mattress measuring approximately:
150 cm wide x 200 cm long
This is the mattress size, not the full external size of the frame. A king size bed frame will normally be larger because of the headboard, side rails and foot end. Upholstered designs can add several extra centimetres to both width and length.
That means a room that can technically fit a 150 x 200 cm mattress may not necessarily accommodate the complete frame comfortably.
Before ordering, measure:
- Available floor width
- Available floor length
- Space around bedside tables
- Wardrobe and bedroom door clearance
- Access around the foot of the bed
- Delivery routes through hallways and stairs
Always use the full product measurements shown on the individual listing.
King Size Bed Frame: What Should You Look For?
The king size bed frame affects the overall footprint, support system, appearance and storage potential of the bed. When comparing frames, check:
- Overall width and length
- Headboard height
- Base type
- Under-bed clearance
- Storage options
- Mattress compatibility
- Assembly requirements
A padded frame can look more substantial and provide a softer finish, while a more streamlined design may use less floor space. If your room has low windows, sloped ceilings or wall-mounted shelves, headboard height can also be important.
The correct frame for king size mattress should support the mattress properly while fitting the room without making the layout feel cramped.
King Size Bed vs Double Bed
A king size is both wider and longer than a standard UK double. A standard double mattress is approximately 135 x 190 cm, while a king is approximately 150 x 200 cm.
That extra width and length can make a noticeable difference for couples.
Choose a king size bed if:
- Two adults share the bed regularly
- You want more sleeping space
- The bedroom can accommodate a larger frame
- Extra length is useful for taller sleepers
Choose a Double Bed if the room is more compact or if preserving floor space is more important than additional sleeping width. The best option depends on the room as much as the sleeper.
King Size Bed vs Super King Size Bed
A super king size bed is larger than a king and provides even more sleeping width. A standard UK super king mattress is typically approximately:
180 cm wide x 200 cm long
The additional width makes a super king bed particularly suitable for couples who want maximum personal space. However, the larger size also means a bigger frame and more demanding delivery requirements.
Choose a king when:
- You want more space than a double
- The room is large but not oversized
- You still want room for bedside furniture
Choose a super king bed when:
- Maximum sleeping width is the priority
- The bedroom is spacious
- Delivery access can handle the larger frame
Browse Super King Beds if you are deciding between the two.
King Size Beds for Couples
A king size bed is one of the most practical upgrades for couples moving from a standard double. The extra width creates more personal space, while the extra length can benefit taller sleepers.
This can also help reduce disturbance when one person moves during the night because there is more room between sleeping positions. However, the room still needs to work well during the day.
Make sure both sides of the bed remain accessible where possible, especially if two people use the room regularly.
How to Measure Before Buying a King Size Bed
Measuring is essential before ordering a king size bed frame. Start by marking the expected frame footprint on the floor with masking tape.
Then check whether there is still enough room for:
- Walking routes
- Wardrobe doors
- Bedroom doors
- Bedside tables
- Radiators
- Drawers
- Dressing tables
Next, check the delivery route.
Measure:
- Front doors
- Internal doors
- Hallways
- Staircases
- Landings
- Tight corners
- Lifts where applicable
Large headboards can be one of the most difficult parts to move into the room, so do not overlook vertical dimensions.
Why Buy a King Size Bed From Furniture Instore?
Furniture Instore's king size beds give customers a practical choice for larger bedrooms, couples and anyone who wants more sleeping space than a standard double provides.
You can compare different king size bed frame styles, storage options and mattress setups according to your room and sleeping needs. Most in-stock beds are available for delivery within 7–10 working days, subject to stock availability, delivery area and suitable property access.
Before ordering, confirm the full king size bed dimensions, mattress compatibility and delivery route. Once those practical checks are complete, choose the design that gives you the right balance of space, storage and comfort.
Frequently Asked Questions
What size is a king size bed in the UK?
A standard UK king size bed uses a mattress measuring approximately 150 x 200 cm, although the complete frame will be larger.
Is a king size bed bigger than a double?
Yes. A king is approximately 15 cm wider and 10 cm longer than a standard UK double mattress.
What is the difference between king and super king?
A king mattress is approximately 150 x 200 cm, while a super king size bed is typically around 180 x 200 cm.
Can I get a king size bed with storage?
Yes. Selected designs include ottoman lifting bases or drawers, helping make better use of the floor area underneath the mattress.
Does a king size bed include a mattress?
This depends on the individual product. Some may be sold as a king size bed and mattress, while others include only the frame.
What mattress fits a king size bed?
A standard UK king mattress is approximately 150 x 200 cm. Always confirm the exact frame specification before buying a mattress.
Is a king size bed suitable for couples?
Yes. A king size bed provides more personal sleeping space than a standard double and is a popular choice for couples.
How do I know if a king size bed will fit?
Check the complete frame measurements and compare them with your bedroom, furniture clearances and full delivery route before ordering.
What is a superking bed?
A superking bed is larger than a standard king and typically uses a mattress measuring approximately 180 x 200 cm in the UK.
How quickly can a king size bed be delivered?
Most in-stock beds are available for delivery within 7–10 working days, subject to stock availability, delivery area and suitable property access.