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Sofa Dimensions: How to Measure a Sofa to Fit Perfectly in Your Home
Buying a sofa without measuring first can be an easy and costly mistake. A sofa that looks perfect online can turn out too wide for the wall, too deep for the room or, worse, too big to get through the front door. This guide walks you through every measurement that matters, from the sofa itself to your room, doorways and staircase, so your new sofa arrives and fits without any surprises.
Key Takeaways
A sofa has several measurements worth knowing: width, height, depth, seat depth, seat height and diagonal depth
Dimensions may vary even within the same seat count, so check the exact figures on the product page before you buy
Measure every doorway, hallway, staircase and lift on the delivery route, then compare the narrowest points with the sofa's dimensions before you order
Testing the sofa's footprint with tape, newspaper or boxes on the floor is the easiest way to see how it will actually sit in the room
Corner sofas, U-shaped sofas, recliners and sofa beds each need one or two extra measurements beyond the basics
A Sofa's Key Dimensions
Every sofa listing uses a similar set of measurements, and once you know what they mean, comparing sofas becomes far easier. Here's what each one tells you and why it matters.
Width (arm to arm)
the widest point of the sofa, from the outer edge of one arm to the other. On some listings this is labelled length instead, so check which figure the diagram is pointing to.
Height (floor to top)
measured to the highest point of the backrest. Some listings give both a frame height and a separate overall height, and it's the overall height you want when checking windowsills, shelves or a sloped ceiling.
Diagonal depth
measured diagonally from the highest point at the back of the sofa to the lowest point at the front. It's a useful extra check for tilting a straight sofa through a doorway, but it works alongside the clear opening and available turning space rather than replacing them.
Depth (front to back)
the distance from the sofa's furthest forward point to its furthest back point, which shows how far it will project into the room.
Seat depth
the distance from the front edge of the cushion to the backrest, which affects how upright or how sunk-in the seating feels.
Seat height
measured from the floor to the top of the seat cushion, worth checking if very low or very high seats are uncomfortable for you.
Pro tip: check whether the legs or other parts are designed to be removed for delivery, and ask for the dimensions in that configuration. Removing detachable legs can reduce the height enough to help with a tight doorway or staircase, but don't assume any part can be safely taken off unless the retailer or delivery team confirms it.
Standard Sofa Dimensions
There's no single fixed size for each seat count, and even within one retailer's range, dimensions vary by model and mechanism. The figures below combine general size guidance with examples from our current catalogue.
| Sofa Type | Width | Depth | Height |
|---|---|---|---|
| 2 Seater | 171-183cm (67-72in) | 91-97cm (36-38in) | 89-93cm (35-37in) |
| 3 Seater | 195-218cm (77-86in) | 91-101cm (36-40in) | 89-105cm (35-41in) |
| 4 Seater (straight) | Around 240cm (94in) | Around 97cm (38in) | Around 89cm overall (35in) |
(straight)
On some product listings the front arm-to-arm measurement is labelled width, on others length, and a few pages list both a frame height and a separate overall height. Use the diagram and the full set of figures on the exact product page to confirm which measurement is which.
For example, the Vegas 2 Seater Sofa measures 171cm wide and the Sloane 2 Seater 183cm, while their 3 seater equivalents measure 195cm and 208cm. Dimensions may vary between versions and configurations within the same range, so check the measurements on the exact product page when you buy 3 seater sofas online.
Straight 4 seaters are less common than 2 and 3 seaters, since a sofa that long can dominate a standard UK living room. The Sloane 4 Seater Straight is one current example at 240cm wide and 97cm deep. Four-seat capacity is more often found through corner or U-shaped layouts instead. You can shop corner sofas ranging from the compact 214cm-wide Chelsea to large modular configurations.
Measure the Delivery Route:
Doorways, Hallways, Stairs and Lifts
Even the perfect sofa is no good if it can't get into the room. Before you buy, measure every access point your delivery team will need to pass through.
Front door
open the door fully and measure the clear usable width and height inside the frame, accounting for handles, letterboxes or hinges that reduce the opening.
Hallways and internal doors
measure the narrowest point of any corridor or doorway between the front door and the room, watching out for radiators, skirting boards or tight corners.
Staircases
if the sofa needs to go upstairs, measure the width of the stairs, the height above them, and any turns or landings. Check whether the sofa is delivered whole or in sections, since that changes what actually has to go up the stairs.
Lifts
measure the clear door opening plus the internal width, depth and height, and check whether the largest section can be turned between the corridor and the lift entrance.
Compare the sofa's width, height and depth against every part of the route, not just one figure. Diagonal depth is a useful extra check if a straight sofa may need to be tilted through a doorway, but adequate turning space matters just as much. Many corner, modular and U-shaped sofas are supplied in separate sections, which usually makes access easier, though it's worth checking the number and size of the sections for your exact model instead of guessing from the assembled size.
Before you order, it helps to have all of this written down in one place: the sofa's overall width, depth and height; the size of its largest delivered section; any removable-leg dimensions; the clear width and height of every doorway; the narrowest hallway point; staircase width and overhead clearance; lift dimensions if relevant; and the tightest turning point on the route.
Measure Your Room
Once you know the sofa will get into the house, the next question is whether it actually works in the space you have. This means measuring more than just the empty floor area.
The room's wall-to-wall width and depth, the height from the floor to any windowsill, and the lowest point of any sloped ceiling
The distance to any radiators, fireplaces, alcoves or fixed furniture that limit where the sofa can go
A clear route of around 75-90cm where people regularly walk through the room, though smaller gaps can work in spots with no through-traffic
The space needed to fully open nearby doors, drawers and cupboards, move dining chairs, use floor lamps, and do anything else you'd normally do beside the sofa
Mark out the sofa's full footprint with masking tape, newspaper or boxes, using its width and depth from the product page. If it has a high back or will sit under a window, stack a few boxes or tape the wall to represent its height too, then stand back and look at it from the doorway. This shows you far more about scale and flow than a tape measure alone.
How to Measure a Sofa for Comfort
Product dimensions don't always tell you how comfortable a sofa will feel in practice, so it's worth thinking about your own body alongside the numbers.
Seat depth varies considerably between models. The Chelsea Cream Left Corner Sofa has a 50cm seat depth, the Vegas 3 Seater is listed with a 67cm seat depth, and the Sloane 3 Seater reaches 76cm. A shallower seat generally supports a more upright sitting position and may make it easier for shorter users to keep their feet flat on the floor, while a deeper seat gives you more room to recline or curl up.
Seat height affects how easily your feet reach the floor and how much effort it takes to stand up. Current examples across several ranges sit in a fairly narrow band of 44 to 47cm from the floor. Whether that feels comfortable depends on your height, leg length and how easily you can sit down and stand up, so it's worth checking this figure specifically on the listing.
If you're considering a chaise or corner sofa, compare the usable chaise length with your height and preferred sitting position. The section's overall length includes the frame and backrest, so it isn't quite the same as your usable legroom. It's also worth thinking about how upright or how sunk-in you want the seating to feel: high-back designs can provide more upper-back and head support depending on your height, while low-back sofas often feel more relaxed but may offer less support over long periods of sitting.
How to Measure Different Types of Sofas
The basic principles above apply to every sofa, but a few shapes need one or two extra measurements. Here's what to check depending on the type you're considering.
Standard (Straight) Sofas
Standard (Straight) Sofas
For room planning, start with the sofa's overall width, depth and height. For access, also check the size of the largest delivered section and, where it's listed, the diagonal depth.
How long is a 3 seater sofa? Fixed 3 seaters in the current range, such as the Vegas and Sloane, measure 195cm and 208cm wide, and larger electric recliners can reach 213 to 218cm. Seat count alone doesn't determine size, so always check the individual listing.
How big is a 2 seater sofa? Two examples from the current range are the 171cm-wide Vegas and the 183cm-wide Sloane, showing that seat count alone doesn't tell you the width, so it's worth checking the exact model.
Corner Sofas
Corner Sofas
Room size for a corner sofa isn't fixed, since the two side lengths, seat depth and overall footprint all vary by model. The table below reproduces broad room-planning guidance used across the current range. Treat these figures as starting points, since doors, other furniture and required walkways affect what will actually fit.
| Corner Sofa Size | Minimum Room Size | Recommended Room Size | Typical Seating Capacity |
|---|---|---|---|
| Small corner sofas | 3 × 3m | 3.5 × 3.5m | 3-4 adults |
| Medium corner sofas | 3.5 × 4m | 4 × 4.5m | 4-5 adults |
| Large corner sofas | 4 × 4m | 5 × 5m | 6-7 adults |
Small corner sofas
Medium corner sofas
Large corner sofas
U-Shaped Sofas
U-Shaped Sofas
A U-shaped sofa wraps around on both sides, so alongside the usual measurements, check the total width and depth of the whole horseshoe shape, not just one section. The table below is broad guidance, not a guaranteed minimum, since labels such as small, standard and large aren't precisely standardised and doors, other furniture and walkways all affect what will actually fit.
| U-Shaped Sofa Size | Recommended Room Size | Typical Seating Capacity |
|---|---|---|
| Small U shape | Around 4 × 4m | 5-6 people |
| Standard U shape | Around 4.5 × 4.5m | 6 people |
| Large U shape | Around 5 × 5m | 7-8 people |
Small U shape
Standard U shape
Large U shape
Recliner Sofas
Recliner Sofas
A recliner sofa needs two extra checks beyond its resting dimensions: how far it extends when fully reclined, and how much space it needs behind the backrest for the mechanism to tilt. Check the fully reclined depth and recommended rear clearance for your exact model, since this varies by mechanism, and make sure the extended footrest will not hit a coffee table or radiator, or block a main walkway. If you're planning to shop recliner sofas for a compact room, look for models specifically described as wall-hugging or space-saving, and confirm the required rear clearance before ordering.
Sofa Beds
Sofa beds need one extra figure beyond the folded dimensions: the extended length once the bed is pulled out. Many sofa beds need an opened depth in the region of 1.5 to 2 metres, though the exact figure depends on the mechanism, so use the fully opened dimensions of the individual model rather than adding a generic allowance to its closed size.
Sofa beds need one extra figure beyond the folded dimensions: the extended length once the bed is pulled out. Many sofa beds need an opened depth in the region of 1.5 to 2 metres, though the exact figure depends on the mechanism, so use the fully opened dimensions of the individual model rather than adding a generic allowance to its closed size.
| Sofa Bed Type | Approximate Closed Overall Span |
|---|---|
| Corner sofa bed | 240-254cm |
| U-shaped sofa bed | 289-307cm |
| Small sofa bed | 160-190cm |
| Standard 3 seater sofa bed | 180-230cm |
Corner sofa bed
U-shaped sofa bed
Small sofa bed
Standard 3 seater sofa bed
FAQs
Measure width arm to arm, height from the floor to the highest point of the back, and depth from the sofa's furthest forward point to its furthest back point. For doorway and hallway access, also check the diagonal depth where it's available, along with the clear opening and the space needed to turn or tilt the sofa.
The 2/3 rule is a visual-design guideline suggesting a sofa can look balanced when it takes up around two-thirds of the wall behind it. It isn't a fitting rule: doorway access, circulation space and the position of other furniture matter more than following the ratio exactly.
At around 183cm, a 72 inch sofa is close to the width of the Sloane 2 Seater, so it's best treated as a generous 2 seater rather than a small 3 seater. At this width, it can work well in a smaller room or as part of a larger seating arrangement.
Sizes vary more here than the seat count suggests. The Sloane 4 Seater Straight in the current range measures around 240cm wide and 97cm deep, while four seat corner layouts use two side measurements instead, such as the 265 × 265cm Sloane Double Corner.
Common mistakes include measuring the empty room without allowing for walkway space, forgetting to check the full delivery route before ordering, overlooking open doors and drawers, and choosing a sofa by seat count alone rather than its exact dimensions.
In everyday use, sofa and couch describe the same piece of furniture. Sofa is the more common term on UK retail sites, while couch is used more often in the US.
Comfortable seat height differs from person to person, but current examples across several ranges generally sit around 44 to 47cm from the floor to the top of the seat. The right choice depends on your height, whether your feet rest comfortably on the floor, and how easily you can sit down and stand up.
A 12 × 12ft room is roughly 3.66 × 3.66m. A straight 3 seater around 195-208cm wide or a compact corner sofa such as the 214 × 167cm Chelsea may be workable, depending on the position of doors, windows and other furniture. A large U-shaped sofa is much less likely to leave practical circulation space in a room this size. Mark the exact footprint on the floor before ordering.
A sofa may be too big if it blocks a main walking route, prevents a door or drawer from opening, obstructs a radiator, or leaves no practical room for other furniture. Judge the main walkway separately from smaller gaps beside or behind the sofa, and test the exact footprint with tape on the floor before you order.
A 72 inch, or 183cm, sofa such as the Sloane 2 Seater is generally best treated as a 2 seater. Whether a third person can perch briefly depends on the width of the arms and the usable seat area, not the overall width alone.
A straight 4 seater such as the Sloane 4 Seater Straight measures around 240cm wide. Five-seat and larger layouts are more commonly found as corner or U-shaped sofas, which are sized by two side measurements instead of one width, so compare the full footprint instead of relying on a single average figure.
