What Size Corner Sofa for a Small Room?

Short answer: in a room under 20 m², a corner sofa should be 220 × 160 cm at the absolute minimum and no more than 260 × 180 cm. Seat depth stays at or under 95 cm, and you must be left with a 60 cm walkway on the open side. The number that kills most corner-sofa purchases is not the footprint — it is the diagonal you forgot to measure on the way in.

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Corner sofas are sold on the promise of more seats per square metre, and that is true: a 240 × 170 cm L seats four comfortably in 4.1 m², where four-seats-in-a-row plus an armchair would need 5.2 m². What the showroom does not mention is that the L swallows the corner of the room, and corners are where the floor lamp, the plant and the only clear walking line used to live.

Footprints that work

Below 180 × 140 cm, an L-shape stops being a sofa and becomes a very confident armchair. At that size you are better off with a 200 cm three-seater plus a 40 cm-wide side table in the corner, which seats the same number and keeps the room's diagonal open.

Seat depth, the silent space eater

Seat depth — front edge to back cushion — runs 55 cm (upright, formal) to 100 cm (the cloud-sofa slouch). In a small room, 90–95 cm is the practical ceiling: deeper than that and the sofa's front edge pushes 10 cm further into the walkway than the spec sheet suggests, because the seat cushion overhangs the frame.

There is also a body-size element. At 95 cm depth, a 170 cm person's feet do not touch the floor when they sit back. That is comfortable for an hour and miserable for an evening. Deep seats suit tall people and lounging; 55–60 cm suits anyone who wants to eat dinner off a plate on their knees without a lap tray.

The chaise side is a doorway decision

Put the chaise on the side away from the door. Sounds obvious; it is the single most-regretted choice. The chaise addes 70–90 cm of depth on its side, and if that side is the entry path you have built a 90 cm bollard in your own living room. Reversible-chaise models exist exactly for this, and they are worth the extra 5 cm of frame.

Measure the diagonal, not just the walls

Three measurements before you order. The wall lengths the sofa will touch. The 60 cm walkway — and check that the walkway is a straight line, not a slalom around a radiator. And the delivery route: door widths, hallway turns, stair bends, lift dimensions. A 251 cm sofa does not go around a 90 cm hallway corner in one piece; most corner sofas ship in two or three modules for exactly this reason, and you should confirm that before paying, not after the van arrives.

Rough rule: if the longest single module is over 200 cm, it needs a 100 cm clear straight run and a 110 cm doorway. If it is over 240 cm, it needs a lift that fits it or a window that opens.

Making a small room behave

Float the sofa 60 cm off the back wall if the room is over 320 cm deep — the walkway behind becomes storage for a slim console and the room reads wider. In a room under 280 cm deep, push it to the wall and skip the console. Use a rug at least 200 × 140 cm so the front feet sit on it; a rug that only touches the sofa's front edge makes the L look like it is falling forwards. And keep the corner above the sofa empty — no floor lamp, no plant — or the L-shape plus a lamp stem reads as a barricade.

When not to buy an L at all

If the room has two doorways on adjacent walls, an L will block one of them. If the TV has to sit opposite the long leg, the chaise will face the window and nobody will sit on it. In both cases a 210 cm three-seater plus a 70 cm armchair seats four, moves when you need it to, and costs 15–25% less. The corner sofa is not the default; it is the answer to a specific layout.

Keep reading

More dimension guides are in the collection, and the full index is on the furnolio journal.