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Home>Blog>The Ultimate Guide to Sofa Sizes and Dimensions
A performance fabric sofa placed in an expansive living room with a matching coffee table and side table.

The Ultimate Guide to Sofa Sizes and Dimensions

Castlery|Dec 04, 2024

Choosing the perfect sofa is the first step in creating a living room where you can truly relax, host, entertain, or just spend time in. But with so many different sofa sizes and configurations available, it can be tricky to know where to start.


This guide will walk you through the standard sofa dimensions, help you understand how wide sofas tend to be across various styles, and offer expert tips to find the ideal fit for your space.


Understanding sofa dimensions


Before diving into specific sofa sizes, let's break down the key measurements to consider:


Seat depth


This refers to the distance from the front edge of the seat to the back cushion. A deeper seat allows you to curl up and relax, while a shallower seat is better for those who prefer to sit upright.


It’s also important to consider when planning how far the TV should be from your couch so you can have the perfect movie nights at home. Aim for a seat depth that complements your lounging style and allows for comfortable viewing distance.

If you love cloud-like lounging, the Jonathan Extended Side Chaise Sectional Sofa offers deep seats - one of the deepest in our range. Picture credits: @kylei.ann

A person lounging on a sofa reading a book.
A person sitting on a white sofa with 2 dogs.

Even @hannahpak’s pups enjoy the plush seats of the Dawson L-shape Chaise Sectional Sofa Set.

Seat height


This measurement is taken from the floor to the top of the seat cushion. Consider your height and preferred seating posture when choosing the right seat height. If you prefer a more upright posture, a higher seat height might be preferable. 


Conversely, if you like to sink into your sofa, a lower seat height might be more comfortable.


Back height


Measured from the floor to the top of the sofa back, this dimension impacts both comfort and visual presence. A high back offers more support and can create a sense of grandeur, while a low back provides a more casual and open feel.


Arm height


This measurement is taken from the floor to the top of the armrest. Arm height can affect how comfortable it is to rest your arms or even take a quick cat nap on the sofa. 


Consider the height of your coffee table or side tables when choosing a sofa with armrests so that the different heights complement each other rather than clash.


Overall width


This is the total width of the sofa from one armrest to the other. It's a crucial measurement for ensuring the sofa fits comfortably in your space.


No matter how big your living room is, always measure your available space carefully before deciding on a sofa – it can be easy to get carried away with imagining where the rest of your living room furniture is going to be. You don’t want to get stuck with a sofa that’s too big or too small!

The compact Auburn Performance Fabric Sofa is great for cosier spaces like @northshoreloft’s. Also pictured: The Guin Round Coffee Table, Guin Round Side Table, and Cora Wool Area Rug.

A performance fabric sofa placed in an expansive living room with a matching coffee table and side table.
A white extended sofa with a matching ottoman placed in the living room in front of windows and a fireplace.

For larger spaces like @hamiltonhaven5, you have more freedom to choose your sofa sizes, like the Dawson Extended Sofa Set.

Standard sofa dimensions: a quick overview


While sofa dimensions can vary significantly, here's a general guide to typical sofa dimensions for common styles.


Apartment sofas


These compact sofas are designed for smaller spaces and tiny living room layouts, typically measuring around 182cm in width. They are ideal for maximising space without sacrificing comfort.


2-seater sofas


Ideal for cosy seating for two or as a complement to larger sofas in a spacious living room, 2-seater sofas usually measure between 132 and 180cm wide.


Sectional sofas and modular sofas


Sectional sofas and modular sofas come in various configurations and sizes. A standard three-seater sofa can range from 213 to 274cm wide, making them ideal for larger living spaces and flexible seating arrangements.


How wide is a sofa?


The average couch width can vary depending on the style and intended use. For instance, a petite settee designed for a small apartment might be as narrow as 152cm, while an expansive sectional sofa meant for a large family room could exceed 300cm. 


Consider the scale of your living room and the desired seating capacity when determining the appropriate sofa width.


Sofa styles and configurations: Finding your perfect match


Beyond the basic sofa and categories, there's a world of styles and configurations to explore. Understanding the nuances of each can help you choose a sofa size that complements your aesthetic and lifestyle.


Arm styles


From the classic rolled arms of a Chesterfield to the sleek track arms of a modern sofa, arm styles play a significant role in the overall look and feel. Flared arms can add a touch of elegance, while track arms have a cleaner, more contemporary aesthetic.

Armless sofas like the Marlow Performance Bouclé Curve Sofa can create a more streamlined look for smaller spaces. Picture credits: @carlyamcdonagh

A performance bouclé 3-seater sofa with channel tufted features.
A person sitting on a performance fabric sofa with a book in hand.

If you aren’t limited by space like @liberty.interiors, you can also consider sofas with arms, such as the Fable Performance Fabric Sofa. Also pictured: The Faro Sculptural Floor Lamp.

Back styles


Consider the back style that best suits your comfort and design preferences. Tight backs offer a more formal look, while cushion backs provide a relaxed and inviting feel. 


Pillow backs offer a plush and comfortable option, perfect for sinking into or for cushioning active
kids running around the living room.


Leg styles


Sofa legs can significantly impact the overall style. Tapered legs offer a mid-century modern vibe, while bun feet add a touch of traditional charm. Splayed legs create a sense of visual lightness and airiness, which can soften visually heavy materials such as leather.


What to consider when choosing sofa sizes


Finding the perfect sofa size for your space involves more than just measuring the width. Here are some key factors to consider:


Room size and layout


Measure your living room carefully, taking into account existing furniture and walkways, as well as the flow of traffic through the space. A large sofa can overwhelm a small room, while a small sofa might get lost in a spacious area.


Seating needs


How many people do you need to accommodate on a regular basis? Consider your lifestyle and entertaining habits, and whether a sectional or modular sofa may be better if you frequently entertain guests.

@oakavehouse opts for the Owen Sofa and Jonathan Extended Leather Sofa for ample seating in the living room.

A leather extended sofa and a white sofa placed in the living room with a black coffee table.
A modular l-shape sectional sofa in spill-resistant fabric and a round ottoman used as a coffee table.

The Marlow Performance Bouclé L-Shape Sectional Sofa is a modular piece that allows you to customise your layout to suit your needs. Picture credits: @marshy.home

Style and proportion


The style of the sofa can also influence its size. A minimalist sofa with sleek lines might appear visually lighter than a bulky, overstuffed sofa, even if they have similar dimensions.


Personal comfort


Ultimately, the best sofa size is the one that feels most comfortable for you and your family. Consider your preferred seating depth, height, and overall feel. If possible, test out different sofas in person to get a sense of their comfort and scale.


Maximising your sofa's potential: Tips for small spaces


If you're working with a smaller living room, choosing the right sofa size and arranging it strategically can make a world of difference. Here are some space-saving styling techniques to consider:


Opt for multi-functional sofas


Sofa beds or sofas with built-in storage can be excellent space-saving solutions. They offer extra sleeping space for guests or provide hidden storage for blankets, pillows, gaming consoles, and more.


Utilise vertical space


Choosing a sofa with a high back can create a sense of height and make the room feel larger. This draws the eye upward and creates a sense of spaciousness. Complement with other elongated decor items like a mirror or wall tapestry to enhance the effect further.


Create visual flow


Position the sofa strategically to maximise space and create a sense of openness. Avoid placing the sofa in a way that blocks walkways or creates a cramped feeling. Consider floating the sofa away from the wall to create a more dynamic and spacious layout.

@lexieemurray strategically places the Aria Arch Floor Mirror behind the Dawson Wide Chaise Sectional Sofa to create the illusion of a larger space. Also pictured: The Guin Round Coffee Table.

A person sitting on a sofa while arranging a vase of flowers.
A black cane sofa placed in a living room.

Ample sunlight enters @jessie_khoo’s living room, creating a bright space. Pictured: The Lucia Cane Sofa in Black.

Finding the perfect sofa fit


Choosing the right sofa size is an important decision that can set the tone for the comfort, style, and ambiance of your living room. 


Whether you opt for a compact leather sofa, a stylish 3-seater sofa, or a complete living room couch set, follow our tips to help you create a space you’ll love for years to come.

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