A standard Sofa is usually about 180 to 220 cm long for three seats, while two-seat sofas often measure approximately 140 to 180 cm and single seats can range from about 70 to 110 cm. These are planning ranges rather than fixed standards. An OEM/ODM manufacturer of custom-size Office Sofas must consider seat count, arm width, depth and room circulation before finalizing the dimensions.

Typical Sofa Dimensions by Seating Capacity

The ranges offer an early planning reference. Buyers should use the exact product drawing before construction, purchasing or shipping arrangements are finalized.

Length Is Only One Part of Sofa Size

A sofa can fit the wall and still feel wrong in the room. Overall depth influences circulation, while back height affects sight lines and the visual openness of the space.

Important dimensions include:

• overall length;

• overall depth;

• overall height;

• seat width;

• seat depth;

• seat height;

• armrest width;

• leg or base height.

A low-backed sofa may suit an open reception space because it preserves visibility. A deeper sofa can feel relaxed but occupy too much floor area in a narrow office.

Why “Standard” Changes Between Sofa Styles

Office sofas often use a more upright seat and controlled depth to support conversation and easier standing. Lounge Sofas are generally deeper and may have softer cushions. Modular seating uses independent units, so its final length depends on the selected combination.

OUHE’s product range demonstrates this difference. Our elegant waiting-area sofa lists a three-seat length of 208 cm and a depth of 84 cm. The brown modern office sofa lists a three-seat length of 192 cm and a depth of 79 cm.

Both are three-seat office sofas, but their proportions create different spatial and sitting experiences.

Match the Sofa to the Room, Not Just the Wall

Measure the complete furniture zone, including coffee tables, side tables and circulation routes. Doors, drawers and storage cabinets must remain usable after the sofa is installed.

For a reception room, also consider how guests face the reception desk or meeting area. A long sofa placed against the only available wall may technically fit but leave users facing the wrong direction.

Small spaces often benefit from a two-seat sofa plus a movable single chair. Larger rooms can use a coordinated 1+1+3 arrangement to support both group and individual seating.

How Custom Sizing Affects Production

Changing overall sofa length can affect more than one frame rail. Cushion proportions, upholstery cutting, arm locations, support points, carton size and loading quantity may all change.

An OEM/ODM manufacturer of custom-size office sofas therefore needs an approved drawing before mass production. Buyers should specify which dimensions may change and which visual proportions must remain consistent.

We operate a furniture production base of more than 50,000 square metres with seven related factories, including metal stamping, robot welding, hardware spraying, PU, sofa, carton, packaging and shipment facilities. This structure supports coordinated furniture development and export delivery.

Select the Right Standard or Customized Size

Standard sizes simplify quotation, production and replacement orders. Customized dimensions are valuable when a wall, room layout or branded collection requires a specific footprint.

Our sofa range includes one-, two- and three-seat formats, with customized sizes available on selected models. Buyers can click to view our sofa categories before choosing a starting design.

Develop a Sofa Around Your Floor Plan

Provide the room drawing, required seat count, maximum overall size, upholstery preference and purchasing volume. We can assess whether a current model fits or a dimensional adjustment is needed. To work with our OEM/ODM manufacturer of custom-size office sofas, send us your layout and request a project quotation.