A sofa is one of the most important furniture pieces in any living room, and the right size can make a big difference to both comfort and layout. 

Sofa dimensions can vary depending on the style, from compact 1-seater and 2-seater options to larger 3-seaters, chaise lounges, sectionals, and modular designs, so choosing the right fit starts with understanding the space you have available.

In this blog, we will explain the standard sofa sizes and dimensions in Australia. We will also cover the key factors to consider before choosing the right sofa for your home.

Common Sofa Types in Australia and Their Dimensions

Sofas come in many shapes and sizes. Below, we have grouped sofa types by clear dimension ranges. Have a look.

1-Seater Sofa

Length: 90–110 cm

Width: 80–95 cm

Depth: 80–95 cm

Seating Capacity: 1 adult

Best For: Bedrooms, reading corners, home offices, compact apartments, and small lounge spaces.

2-Seater Sofa

Length: 140–180 cm

Width: 80–95 cm

Depth: 80–95 cm

Seating Capacity: 2 adults

Best For: Apartments, small living rooms, guest rooms, and secondary seating areas.

2.5-Seater Sofa

Length: 160–200 cm

Width: 85–100 cm

Depth: 85–100 cm

Seating Capacity: 2–3 people

Best For: Couples who want extra space, small families, and medium-sized rooms.

3-Seater Sofa

Length: 180–230 cm

Width: 85–100 cm

Depth: 85–100 cm

Seating Capacity: 3 adults

Best For: Main living rooms, family rooms, and medium-sized spaces.

Chaise Sofa

Length: 220–280 cm

Width: 140–180 cm

Depth: 140–180 cm overall footprint

Seating Capacity: 3–4 people

Best For: Lounging, movie nights, relaxed family rooms, and open-plan living. 

Sectional / Corner Sofa

Length: 250–350 cm

Width: 150–250 cm

Depth: 150–250+ cm overall footprint

Seating Capacity: 4–6+ people

Best For: Large living rooms, open-plan homes, and households that need generous seating. Sectionals vary a lot because the corner return or chaise changes the footprint.

Modular Sofa

Length: 240–360 cm

Width: 150–240 cm

Depth: 100–240+ cm, depending on the layout

Seating Capacity: 4–6+ people

Best For: Flexible homes, changing layouts, and open-plan spaces. Modular sofas are the easiest type to resize, so their depth can stay compact or become very deep depending on how the pieces are arranged.

Sofa Bed / Recliner Sofa

Length: 180–240 cm

Width: 90–110 cm

Depth: 90–110 cm when closed

Seating Capacity: 2–3+ people

Best For: Guest rooms, multi-purpose spaces, and homes that need extra functionality. 

Sofa Sizes Comparison Table

Sofa Type	Length (cm)	Width (cm)	Depth (cm)	Seating Capacity	Best For
1-Seater	90–110	80–95	80–95	1	Bedrooms, reading corners, small spaces.
2-Seater	140–180	80–95	80–95	2	Apartments, small living rooms.
2.5-Seater	160–200	85–100	85–100	2–3	Couples, small families.
3-Seater	180–230	85–100	85–100	3	Main living rooms, family rooms.
Chaise	220–280	140–180	140–180	3–4	Lounging, open-plan living.
Sectional / Corner	250–350	150–250	150–250+	4–6+	Large rooms, family seating.
Modular	240–360	150–240	100–240+	4–6+	Flexible layouts, custom setups.
Sofa Bed / Recliner	180–240	90–110	90–110	2–3+	Multi-purpose rooms.

 

10 Things to Consider Before Choosing a Sofa

1) Room Size and Shape

Start with the room. A sofa should suit the proportions of the space and leave enough breathing room around it. A large sofa can look perfect in a showroom and still feel too heavy in a smaller lounge room.

2) Sofa Footprint

Do not rely only on the marketing photo. Check the total footprint, including arms, cushions, and any curved edges. The full footprint is what affects movement, balance, and furniture placement in the room.

3) Walkway Clearance

You need enough space to move comfortably around the sofa. In practical room-planning advice, a clear buffer around the sofa is important so the room does not feel cramped.

4) Doorways and Hallways

Measure every doorway and hallway on the route to the room, not just the front entry. A sofa that fits the room still may not fit the delivery path.

5) Diagonal Depth

Diagonal depth is one of the most useful delivery measurements. When a sofa is tilted or rotated, this is often the number that determines whether it can get through a doorway.

6) Seat Depth

Seat depth has a big effect on comfort. Shallower seats are better if you like sitting upright, while deeper seats are better for lounging, stretching out, and movie nights.

7) Seat Height

Seat height affects how easy it feels to sit down and stand up again. It also changes the visual proportion of the sofa in the room, so it should be considered alongside seat depth and overall height.

8) Back Height

A sofa with a higher back often feels more supportive, while a lower back can look more modern and open. The right back height depends on how you want the sofa to feel in daily use.

9) Lifestyle Fit

The sofa should match how you live. If you entertain often, need family seating, or want a relaxed lounge area, your ideal sofa may be very different from someone who uses it mainly for occasional sitting.

10) Flexibility for the Future

If you may move home, redesign the layout, or change your room function later, modular or adaptable designs can be a smarter long-term choice. Flexibility matters just as much as the initial look.

Get Your Perfect Sofa at Compressed Comfort Furniture

Now that you know the right sofa dimensions for your space, explore the perfect fit at Compressed Comfort Furniture and upgrade your home with stylish, space-saving comfort. 

From compact 1-seaters to large modular lounges, we offer modern sofas designed specifically for Australian homes.

Explore our sofa collection 

FAQs

What is the 2/3 rule for sofas?

The 2 / 3 rule for measuring a sofa size means that the sofa must cover ⅔ of the space of the wall it will be placed against.

What are the standard sizes for sofas?

The sofa sizes, although they depend on various factors, such as room size. However, the standard size ranges 180–240 cm (70–95 inches) in width, 90–100 cm in depth, and 80–95 cm in height.  

How do I choose the right size sofa for my space?

To choose the right sofa size for your space, it is important to measure the room size, entrance, staircase, and lift size. Because if it gets stuck in the hallway, your sofa can be damaged. 

Is a sectional sofa better than a standard sofa?

A sectional is usually better for larger rooms and families that need more seating. A standard sofa is usually better for smaller rooms or layouts that need more flexibility.