The Complete Guide to Choosing the Right Sofa Size for Your Space

Nothing transforms a living room quite like a well-proportioned sofa. Too large, and the room feels cramped. Too small, and the space feels unfinished. Getting the proportions right requires more than just measuring the wall — it demands understanding how furniture relates to the architecture around it.

Start With the Room, Not the Sofa

Before browsing sofas, map your room. Measure the full dimensions, then note:

• Doorways and walkways: You need at least 90cm of clear passage for comfortable movement
• Focal points: Where is the TV, fireplace, or window view? Your sofa should relate to these
• Traffic flow: How do people move through the room? The sofa shouldn't block natural pathways
• Other furniture: Coffee tables, side tables, and entertainment units all need their own space

The Golden Ratio for Sofa Sizing

A well-proportioned sofa typically occupies no more than two-thirds of the wall it sits against. This leaves breathing room on either side for side tables, floor lamps, or simply visual space.

For open-plan living — increasingly common in Australian homes — the sofa often defines the living zone rather than sitting against a wall. In these cases, consider the sofa as a spatial divider and ensure it doesn't visually overwhelm the combined space.

Sofa Size Categories

Compact (under 200cm)

Best for apartments, studios, and secondary living areas. A 180cm two-seater can comfortably seat two adults and fits through most standard Australian doorways without issue.

Standard (200-260cm)

The most versatile range. A 240cm three-seater is the Australian living room workhorse — large enough for family use, compact enough for most rooms.

Grand (260-320cm)

For larger living rooms and open-plan spaces. These statement pieces anchor a room and provide generous seating for entertaining.

Modular and Sectional (320cm+)

The ultimate in flexibility. Modular sofas can be configured to fit L-shaped rooms, wrap around corners, or create intimate conversation areas. Many of our customers in Sydney and Melbourne choose modular options for their adaptability.

Measuring for Delivery

This is where many buyers get caught out. Measure not just the room, but the entire delivery path:

• Front door width and height (standard Australian doors are 820mm wide)
• Hallway width (minimum 900mm for most sofas)
• Stairwell dimensions if applicable (measure the diagonal)
• Elevator dimensions for apartment buildings
• Any tight corners between the entry and the room

At FOBOO, we provide detailed dimensions for every piece and our delivery team conducts a pre-delivery assessment for larger items.

Depth Matters More Than You Think

Sofa depth is often overlooked but dramatically affects comfort:

• Standard depth (85-95cm): Suits most body types and room sizes. Your feet should touch the floor when sitting back.
• Deep seating (95-110cm): Perfect for lounging and relaxing. Popular in casual living rooms but requires more floor space.
• Compact depth (75-85cm): Ideal for smaller rooms or formal settings where upright seating is preferred.

Height Considerations

Sofa height affects the visual weight of the piece:

• Low-profile (under 70cm): Creates a modern, spacious feel. Works beautifully in rooms with high ceilings or floor-to-ceiling windows.
• Standard height (70-85cm): The comfortable middle ground. Easy to sit down and stand up from.
• High-back (85cm+): Provides excellent head and neck support. Can make a room feel more enclosed.

The Comfort Test

Numbers only tell part of the story. When possible, sit on a sofa for at least 15 minutes before committing. Pay attention to:

• Does the seat depth suit your leg length?
• Is the back support at the right height?
• Can you easily stand up without assistance?
• Do the cushions maintain their shape after you stand?

Planning for the Long Term

Consider how your needs might change. A couple might start with a two-seater, but a growing family will need more space. Modular sofas offer the advantage of expandability — you can add sections as your needs evolve.

Our Recommendation

For most Australian living rooms (typically 4m x 5m to 5m x 6m), a three-seater sofa between 220-260cm wide, with a depth of 90-100cm, provides the best balance of comfort and proportion. If you have an open-plan space, consider an L-shaped sectional that defines the living area while providing ample seating for entertaining.

Browse our full sofa collection to find the perfect proportions for your space, and don't hesitate to reach out to our team for personalised sizing advice.

Shop the Look

Explore the pieces mentioned in this article:

• Barley Boucle Modular Sofa Set
• Archini Living Stone Sofa
• Walnut Curve Sectional
• explore all sofas