How to Choose the Right Sofa Size for Your Living Room

May 28, 2026

Choosing a sofa is one of the biggest decisions you'll make for your living room — and getting the size wrong is an expensive mistake. Too small and the room feels sparse; too large and it dominates the space. Here's how to get it right first time.

1. Measure your room before anything else

Before you even start browsing, grab a tape measure. Note down the full dimensions of your living room, then identify the wall or area where the sofa will sit. As a general rule, your sofa should take up no more than two thirds of the wall it's placed against — this leaves breathing room on either side and stops the room feeling cramped.

2. Leave enough clearance around the sofa

You need at least 45cm between your sofa and the coffee table for comfortable legroom, and at least 90cm between the sofa and any walkway or doorway. Sketch out your room to scale before buying — it takes 10 minutes and saves a lot of hassle.

3. Understand sofa types and what they suit

Different sofa configurations work better in different rooms:

L-shaped / corner sofas — ideal for larger living rooms or open-plan spaces. They define a seating zone and maximise corner space. Our versatile Grey L-Shaped Corner Sofa Bed which doubles as a guest bed.
U-shaped sofas — best for large, square living rooms where you want maximum seating. Our Beige Corduroy U-Shape Sectional Sofa and Grey Corduroy U-Shape Sectional Sofa both seat 4 comfortably and include USB charging ports — ideal for family living rooms.
Modular sofas — the most flexible option. You can configure them to suit your space and reconfigure as your needs change. Our Modular Chenille Sectional Sofa with Double Chaise is a premium option that works in a wide range of room sizes.

4. Consider sofa depth, not just length

Most people focus on how long a sofa is, but depth matters just as much. A deep sofa (90cm+) is luxuriously comfortable for lounging but can overwhelm a small room. A shallower sofa (80–85cm) looks more elegant and works better in compact spaces. Always check the depth measurement before buying.

5. Think about how you actually use your sofa

Do you sit upright to watch TV, or do you lie across it? Do you have children or pets who'll be on it constantly? Do you need a sofa bed for guests? Your answers should shape your choice as much as the dimensions. A sofa bed like the Grey 3-in-1 Convertible L-Shaped Sofa Bed gives you flexibility without needing a separate guest room.

6. Use painter's tape to test the size

Before ordering, use painter's tape to mark out the sofa's footprint on your floor. Live with it for a day — walk around it, sit in the space, see how it feels. It sounds simple but it's the most effective way to avoid a sizing mistake.

7. Match the sofa scale to the room

A large sofa in a small room makes the room feel smaller. A small sofa in a large room makes the room feel empty. The goal is proportion — your sofa should feel like it belongs in the space, not like it was squeezed in or lost in it. When in doubt, go slightly larger rather than smaller — a generous sofa reads as intentional and luxurious.