Types of sofa
Standard sofas
The standard 2-seater or 3-seater sofa is the foundation of most living rooms. A 2-seater typically runs 150-170cm wide and seats two adults comfortably - or one adult and a sprawl. A 3-seater runs 200-220cm and genuinely seats three, though most households use the third seat for cushions, blankets, or a pet.
Standard sofas are the simplest to deliver (they fit through most doors without trouble), the most flexible in layout (they work against a wall or floating in a room), and the easiest to replace when the time comes.
Corner sofas
A corner sofa is the statement piece of a living room. It seats more people than a standard sofa, creates a defined seating zone, and eliminates the need for separate armchairs in many rooms. The trade-off is size - corner sofas are large, and once they’re in, they tend to dictate the rest of the room layout.
Corner sofas come in L-shapes and U-shapes. L-shapes fit into a corner of the room and extend along two walls. U-shapes wrap around three sides and work best in large rooms or open-plan spaces where the sofa is the centrepiece.
Sofa beds
A sofa bed earns its place in any room that needs to double as a guest bedroom. Spare rooms are a luxury not everyone has, and a good sofa bed means you can host guests without dedicating an entire room to a bed that’s used twice a year.
The quality gap between sofa beds has narrowed significantly. The best modern sofa beds are comfortable as sofas during the day and genuinely usable as beds at night. The worst are uncomfortable at both jobs. The mechanism, the mattress, and the frame quality are what separate the two.
Recliners
Reclining sofas and chairs tilt back to let you put your feet up without a footstool. Manual recliners use a lever or push-back mechanism. Electric recliners use a motor operated by a button, which is more precise and easier for anyone with limited mobility.
Recliners need wall clearance behind them - typically 10-15cm for the mechanism to tilt back fully. Don’t push a recliner flat against the wall assuming it’ll work. It won’t.
Armchairs
An armchair adds a second seating angle to a living room and gives one person a space that’s entirely theirs. In a room with a large sofa, an armchair positioned at 90 degrees to it creates a conversational layout that works better for talking than two sofas facing each other.
Armchairs are also the easiest seating to add and remove. If your room feels sparse, an armchair fills it without the commitment of another sofa. If it feels crowded, the armchair is the first piece to move out.
Measuring your room
The room itself
Start with the basics. Measure the full length and width of the room. Note where the doors are (and which way they swing), where the windows sit, and where the radiators and sockets are. A sofa that blocks a radiator heats the back of the cushions instead of the room. A sofa that covers the only socket means trailing extension leads across the floor.
Draw a rough plan with these measurements. It doesn’t need to be architectural - a sketch on the back of an envelope with dimensions marked is enough to stop you buying a sofa that physically won’t work.
The path to the room
This is the measurement people forget, and it’s the one that causes the most grief on delivery day. Measure:
- Front door width and height (the opening, not the frame)
- Any turns in the hallway (especially stairwell corners if the sofa is going upstairs)
- The living room door (again, the opening)
- Any tight spots - narrow corridors, low ceilings, banisters
A 3-seater sofa is typically 200-220cm long, 85-100cm deep, and 80-95cm tall. It needs to fit through every opening and around every corner on the route from the delivery van to its final position. Most sofas can be tilted and angled, but there are limits.
Corner sofas are usually delivered in sections, which helps with tight access. Check with the retailer how many sections the sofa breaks into and what the largest single section measures.
Clearances
Once the sofa is in position, you need clear space around it:
- 60cm minimum walkway on any side people pass
- 40-45cm between the sofa and the coffee table
- 100cm between the sofa and the TV for a 55-inch screen
- 10-15cm behind a recliner for the mechanism to operate
Standard sofa sizes
A quick reference for planning:
- 2-seater: 150-170cm wide, 85-95cm deep
- 3-seater: 200-220cm wide, 85-100cm deep
- Corner sofa (L-shape): 250-300cm on the long side, 200-250cm on the short side
- Corner sofa (U-shape): 300-350cm on the long side, 200-250cm on each return
- Armchair: 80-100cm wide, 85-95cm deep
These are general ranges. Always check the specific measurements of the sofa you’re buying against your room dimensions.
The tape trick
Tip: The tape trick. Lay masking tape on the floor in the exact footprint of the sofa you’re considering. Include the arms and any chaise sections. Leave the tape down for a few days and walk around it normally. Can you get past it comfortably? Does the room still feel like a room, or does it feel like a sofa warehouse? This takes five minutes and saves hundreds of pounds in wrong-size returns.
Corner sofas
Left-hand or right-hand
This is the first question and the one most people get wrong. Stand facing the sofa. If the longer chaise section extends to your left, it’s a left-hand corner. If it extends to your right, it’s a right-hand corner.
To work out which you need, stand in your living room where the sofa will go and face the wall it’ll sit against. Which corner of the room is the sofa going into? If the room’s corner is on your left, you need a left-hand sofa. If it’s on your right, you need a right-hand sofa.
Getting this wrong is surprisingly common, and it’s an expensive mistake. Double-check before you order.
Small corner sofas
Not every corner sofa needs to dominate the room. Small corner sofas run 200-230cm on the long side and 160-180cm on the short side, which makes them viable in rooms where a standard corner sofa would be overwhelming.
The trade-off is seating capacity - a small corner sofa seats 3-4 people rather than the 5-6 of a full-size one. For smaller living rooms, that’s usually enough. The corner shape still gives you more seating than a standard 3-seater in the same floor area.
U-shape and modular
U-shape sofas wrap around three sides and create a cocoon-like seating area that’s ideal for movie nights and family rooms. They need a large room - the footprint is significant, and the room needs to feel spacious even with a U-shape in it.
Modular sofas are built from individual sections that can be rearranged. They’re the most flexible option if you might move house or want to reconfigure your layout. The downside is that the joins between sections can feel less solid than a single-frame sofa, and the sections sometimes shift apart with use.
Corner sofa beds
A corner sofa bed combines the seating capacity of a corner sofa with a pull-out sleeping surface. They’re the most space-efficient option for rooms that need to host guests, because the sofa is large enough to be a proper living room centrepiece and the bed mechanism is hidden inside the chaise section.
Check the sleeping surface size carefully. Some corner sofa beds offer a full double sleeping area. Others are closer to a generous single. If you’re hosting couples, the double option is worth the premium.
The corner test
Tip: The corner test. Before committing to a corner sofa, check that the corner seat - the actual corner where the two sections meet - is usable. On cheap corner sofas, the corner seat is too deep to sit in comfortably. You end up with a sofa that looks like it seats five but actually seats four, with a dead zone in the middle. Sit in the corner section specifically and check you can reach the backrest without straining.
Sofa beds
Mechanism types
There are three main sofa bed mechanisms:
Pull-out / click-clack: The seat folds flat or pulls forward to create the sleeping surface. The simplest and cheapest mechanism. The mattress is usually thin foam. Fine for occasional guest use, not suitable for regular sleeping.
Fold-out: A metal frame with a mattress folds out from inside the sofa, concertina-style. Better than pull-out because the mattress is separate from the seat cushions. Quality varies enormously - the best have pocket-sprung mattresses, the worst have thin foam pads.
Italian-style / wall-bed hybrid: The mattress folds down from the back of the sofa rather than pulling out from the front. These offer the best sleeping surface because the mattress stays flat when stored, rather than being folded. They’re also the most expensive mechanism.
Mattress quality
The mattress is where you should spend the money. A sofa bed with a thin foam mattress is uncomfortable for anything beyond a single night. For regular guest use (monthly or more), look for:
- Pocket springs - these respond to body weight individually, like a proper mattress
- At least 10cm thick - anything thinner and you’ll feel the frame through it
- Standard dimensions - check that the sleeping surface matches standard sheet sizes, or you’ll be hunting for specialist bedding
Clearance when open
A sofa bed needs floor space in front of it to open fully. Measure the distance from the front of the sofa to the nearest piece of furniture or wall. Most fold-out mechanisms need 150-200cm of clear space in front. If your coffee table is in the way, you’ll need to move it every time you make up the bed - which gets old fast.
Plan the room so the coffee table can be pushed to one side easily, or choose a lightweight table you can lift out of the way.
Daily vs guest use
If the sofa bed will be someone’s primary bed (a studio flat, a teenager’s room, a home office that doubles as a bedroom), you need a different standard than guest use.
For daily use, prioritise the mattress above everything else. A proper sprung mattress, minimum 12cm thick, with a sleeping surface that matches a standard single or double bed. The sofa comfort matters too, obviously, but you spend more hours sleeping than sitting.
For guest use (a few times a year), the sofa comfort takes priority. A decent fold-out with a 10cm mattress is more than adequate for a night or two, and you’ll use the sofa every day.
Choosing upholstery
Fabric
Fabric sofas are the most popular choice in the UK, and for good reason. They’re available in the widest range of colours and textures, they’re generally warm to sit on, and they’re usually the most affordable option.
The quality of fabric varies enormously. A high rub count (the Martindale test) indicates durability - look for 25,000+ rubs for everyday use, 40,000+ for heavy use. Performance fabrics with stain-resistant treatments are worth the premium if you have children, pets, or a habit of eating dinner on the sofa.
Leather
Leather ages beautifully and develops a patina that fabric can’t replicate. It’s naturally hard-wearing, easy to wipe clean, and doesn’t hold pet hair. Top-grain leather (the outer layer of the hide) is the most durable and develops the best character over time. Split leather and bonded leather are cheaper but won’t age as well.
The downsides: leather is cold when you first sit down, it can be slippery, and it’s more expensive. In a south-facing room, direct sunlight will fade the colour over time unless you position the sofa carefully.
Velvet
Velvet sofas are a statement. The fabric has a depth and richness that flat weave can’t match, and it catches light differently depending on the angle. Modern velvet is more durable than you’d think - performance velvet with a high rub count handles daily use well.
The catch with velvet is that it shows every impression. Sit on it and you leave a mark until the pile rebounds. This is a feature, not a flaw, but it bothers some people. Velvet also isn’t ideal for pet owners - it attracts and holds fur more than flat-weave fabrics.
Choosing colour
Tip: The household test. Before choosing a sofa colour, look at what actually happens on your sofa. Kids with snacks? Dog after a muddy walk? Wine on a Friday night? If the honest answer involves spills, go darker or choose a performance fabric with stain treatment. A cream sofa is beautiful in a showroom and a source of constant anxiety in a real home. Be honest about how your household actually lives, not how you wish it lived.
Neutral colours (grey, charcoal, navy, taupe) are the safest for longevity. You’ll change cushions, throws and the wall colour long before you change the sofa, so a neutral base gives you the most flexibility over the years. Bold colours work on accent chairs where the commitment is smaller.
Frame and cushion quality
Frame materials
The frame is the skeleton. Everything else - cushions, fabric, springs - can be replaced over time, but the frame is what you’re living with. A good sofa frame is:
- Kiln-dried hardwood (beech, birch, or similar) - kiln-drying removes moisture so the wood doesn’t warp or crack over time
- Joined with dowels, screws, and corner blocks - not staples, not nails
- Corner-blocked at every joint for strength
A softwood frame (pine) with stapled joints will creak and flex within a few years. Hardwood with proper joinery will outlast the upholstery several times over. You can’t see the frame in a showroom, so ask the retailer what it’s made from. If they don’t know, that tells you something.
Suspension
The suspension sits on top of the frame and supports the seat cushions. There are two main types:
Serpentine (sinuous) springs - S-shaped metal springs that run front to back. These are the most common in modern sofas. They give a firm, consistent support and are durable. Good quality serpentine springs are clipped to the frame, not stapled.
Webbing - elastic or jute straps woven across the frame. Webbing gives a softer, more flexible feel. Elastic webbing is common in modern sofas. Jute webbing is traditional and has a distinctive bounce, but it stretches and sags over time.
Seat cushions
Seat cushion filling determines how the sofa feels day-to-day and how it ages.
Foam - the standard. High-density foam (35kg/m3 or above) holds its shape and gives firm support. Lower-density foam sags faster. Foam cushions benefit from being turned regularly to distribute wear.
Foam wrapped in fibre - a layer of polyester fibre around the foam core gives a softer initial feel while the foam provides support underneath. This is the most common combination in mid-range sofas and balances comfort with durability.
Feather and down - the luxury option. Feather-filled cushions are soft, enveloping, and look beautifully plump. The downside is that they need plumping every time you stand up, they go flat if you sit in the same spot repeatedly, and they can feel too soft for people who prefer firm support.
Back cushions
Back cushions come in the same filling options as seat cushions, but here the choice is more about preference. Foam backs give a neat, upright look that stays tidy. Fibre-filled backs are softer and more relaxed. Scatter-back designs (separate loose cushions rather than fixed backs) give you the most flexibility but need the most arranging.
Getting comfort right
Seat height
Standard sofa seat height is 40-45cm from the floor. This suits most adults comfortably. If you’re tall, a higher seat (47-50cm) prevents that knees-above-hips feeling. If you’re shorter, a lower seat (38-40cm) lets your feet reach the floor without perching on the edge.
Seat height also affects how easy the sofa is to get up from. A lower, deeper seat is luxurious to sink into but harder to stand up from - something to consider if mobility is a factor for anyone in the household.
Seat depth
Seat depth is the distance from the front edge of the cushion to the backrest. Most sofas run 55-65cm deep. A deeper seat (60-65cm) lets you tuck your legs up or sit cross-legged. A shallower seat (50-55cm) keeps your feet on the floor and your back against the cushion, which is more supportive for sitting upright.
If the seat is too deep for you, your legs dangle and the back cushion feels miles away. If it’s too shallow, you feel like you’re perching. The only way to know is to sit in it.
Arm height
Arms are easy to overlook. Low arms (below shoulder height when seated) let you lie down comfortably with your head on the arm. High arms (shoulder height or above) give you somewhere to rest your elbow and feel more enclosed.
If you nap on the sofa, low arms. If you sit upright to watch TV, higher arms. If the sofa goes under a window, check that the arm height doesn’t block the view from your usual seated position.
Firmness
Firmness is the most personal aspect of choosing a sofa and the hardest to judge from a product description. What one person calls firm, another calls rock-hard. What one person calls soft, another calls unsupportive.
New sofas are always firmer than they will be after a few weeks of use. The foam and springs need a breaking-in period, during which the sofa will soften noticeably. If a sofa feels perfect in the showroom, it may feel too soft after a month at home. If it feels slightly too firm, it’ll probably settle into just right.
The 20-minute test
Tip: The 20-minute test. If you can sit on a sofa before buying, stay for at least 20 minutes. The first 30 seconds of sitting down feel good on almost any sofa - your body adjusts and the initial impression is always positive. The truth emerges after 15-20 minutes, when you start to feel pressure points, notice whether the back support is actually there, and discover whether the seat depth works for your legs. Most people test a sofa for under a minute. That tells you almost nothing.
Buyer’s checklist
Before you order, run through this list:
- Room measured - length, width, door positions, radiator and socket locations noted
- Delivery path measured - front door, hallway corners, living room door, any tight spots
- Sofa size confirmed - specific dimensions checked against room plan, not just “3-seater”
- Tape trick done - footprint marked on floor, lived with for a few days
- Corner orientation correct - left-hand or right-hand confirmed for corner sofas
- Sofa bed clearance checked - enough space in front for the bed to open fully
- Recliner clearance checked - 10-15cm behind for mechanism travel
- Upholstery chosen - fabric, leather or velvet, with colour suited to how the household actually lives
- Frame material confirmed - kiln-dried hardwood with proper joinery
- Cushion filling understood - foam density, fibre wrap, or feather, and the maintenance each needs
- Comfort tested - sat in it for 20 minutes if possible, checking seat depth, height, and back support
- Mechanism tested - for sofa beds and recliners, operated the mechanism yourself and checked mattress quality
- Care instructions read - know what the fabric needs (washable covers, professional clean, or wipe-down)
- Warranty checked - frame warranty should be significantly longer than cushion or fabric warranty
A sofa is one of the biggest purchases you’ll make for your home, and one of the few you’ll use every single day. Getting the measurements right, choosing quality materials, and being honest about how your household lives - rather than how you’d like it to live - is the difference between a sofa you love for a decade and one you’re trying to replace after three years.