What size sofa should you choose? The ultimate guide to a perfect purchase

Choosing the right size sofa for your living room isn't something you can do on a whim. Every centimeter counts to ensure a harmonious layout. To achieve the best results, you need to consider your needs , how you intend to use it, and the configuration of your room. This guide will help you determine the ideal size , width , height , and depth to perfectly integrate your sofa into your home.

Analyze your needs and your living space

Choose the sofa dimensions to suit the size of your living room

Before choosing a model, precisely measure the length and depth of the area where the sofa will be placed. Consider passageways, corners, and doorways. This initial assessment will help avoid excessive clutter and ensure easy movement.

Define the number of seats: Who will use the sofa and for what purpose?

Consider how many people will usually sit on the sofa: two, three, or more? Do you need an extra bed? Or perhaps storage space under the chaise of a corner sofa? These questions are essential to determine the right sofa size for your needs.

Knowing the key dimensions of a sofa

Width: the total footprint on the ground

Generally, allow about 70 to 80 cm per seat. For a 3-seater sofa, expect a width between 170 and 200 cm. The width includes the armrests; don't forget that.

Depth: an important factor for your seating comfort

The seat depth is often between 50 and 60 cm for standard comfort. A deeper seat makes the sofa a cozy space, but takes up more room . For a sofa bed , the depth is generally between 70 cm and 1 m, as the mechanism takes up space.

Height: a choice between back support and a sleek style

The overall height varies considerably; a backrest height of 75–95 cm is common. Opting for a high backrest improves support, while a lower height favors a more modern silhouette.

Some sofas offer adjustable headrests. While they slightly increase the height, they provide ergonomic seating . Remember to check this feature before delivery.

Specific measurements: corner sofa (W1/W2) and sofa bed (ED)

For a corner sofa , the typical dimensions are 280–300 cm in length with a return of approximately 170–200 cm. For a sofa bed, first check the height , then the sleeping area when unfolded (often 140 × 190 cm).

Standard size guide: average dimensions by sofa type

When choosing a sofa, its size must be perfectly suited to the available space and the number of users. Here are some guidelines to help you make the right choice.

Dimensions of a straight sofa (2, 3 and 4 seater)

This compact size fits easily into small rooms or as an addition to a larger sofa. On our website, La Maison Convertible , you'll find models with widths generally ranging from 120 to 180 cm , depths from 80 to 100 cm , and heights from 80 to 90 cm . These proportions ensure comfortable seating while minimizing the floor space required.

Dimensions of a corner sofa (and its chaise longue)

When closed, the model can measure 140–200 cm in width depending on the number of places. Once open, the length often reaches 190 cm or more to ensure comfortable sleeping .

Dimensions of a sofa bed (closed and open)

When closed, the model can measure 140–200 cm in width depending on the number of places. Once open, the length often reaches 190 cm or more to ensure comfortable sleeping .

Adapt the dimensions of the sofa to your body type

Are you tall? Pay attention to the seat depth and backrest height.

If you are taller than average, choose a sofa with a generous seat depth and a sufficiently high back. A seat that is too low or too narrow can force your legs to dangle and your back to arch. For optimal comfort , consider a high back and well-positioned armrests . These features directly influence the sofa size required for comfortable use.

For seniors or people with reduced mobility: seat height is crucial

For the elderly or those with reduced mobility, seat height plays a crucial role. It must allow for easy standing without excessive effort. Furthermore, a high backrest provides better head and neck support: these details influence the overall height of the sofa and therefore the appropriate sofa size . Prioritize models with adjustable headrests for added comfort.

The puzzle of atypical spaces: which sofa for which configuration?

In a narrow living room, opt for a shallow, straight sofa to avoid a corridor effect. A small, centered model helps structure the space without cluttering it.

For a studio apartment, a compact sofa bed or a chaise longue with storage remains the most practical solution. You gain both sleeping space and storage .

When faced with a tricky corner, a modular corner sofa adapts easily. Just be sure to carefully measure the available length and depth to avoid any obstruction to movement.

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Long, narrow living room: how to avoid the "corridor" effect?

In a narrow but long room, the best choice is a moderately sized sofa, placed facing the length to break up the tunnel effect. A moderate width and a measured depth minimize the floor space it occupies. Choosing the right sofa size allows you to balance the layout without obstructing the passageway .

The small living room or studio apartment: the dimensions of compact and multifunctional sofas

In a studio apartment or a very small room, opt for a shallow and compact model. The ideal sofa dimensions here are: width between 140 and 180 cm, maximum depth 90 cm. Models with built-in storage or sofa beds are excellent options for maximizing available space .

Confirm that the sofa will fit into your living room before purchasing.

The foolproof method of using a template on the floor (cardboard or adhesive tape)

Mark the intended size of your sofa on the floor using masking tape or a large piece of cardboard. This visual guide will help you determine if the sofa's dimensions will fit well with your existing furniture. This will prevent any unpleasant surprises upon delivery.

Ensuring smooth traffic flow: minimum distances to respect

Leave at least 45 cm in front of the sofa to allow for easy movement . This ensures you can move around the furniture easily. A sofa that is too large will obstruct this passage.

Use augmented reality tools to visualize the sofa at home.

Many retailers now offer augmented reality applications. Thanks to these features, you can visualize the sofa's dimensions directly in your room at actual scale, providing a reliable way to confirm your choices.

The crucial step: measuring access for delivery

Before receiving your sofa, check that all accessories fit properly:

• Are the legs removable?
• Is the front door wide enough?
• Do the corridors and staircases allow passage?
  Measure the width and height of the front door , as well as any landings or elevators if applicable. Proper preparation will prevent any problems related to incorrectly sized sofas .